diff --git a/README.md b/README.md
index 24df6fa4..5176e13c 100644
--- a/README.md
+++ b/README.md
@@ -146,6 +146,7 @@ $ ./sentry
 - [Alternate Tube Redirector](https://addons.mozilla.org/en-US/firefox/addon/alternate-tube-redirector/): Automatically open Youtube Videos on alternate sites like Invidious or Hooktube.
 - [Invidious Redirect](https://greasyfork.org/en/scripts/370461-invidious-redirect): Redirects Youtube URLs to Invidio.us (userscript)
 - [Invidio.us embed](https://greasyfork.org/en/scripts/370442-invidious-embed): Replaces YouTube embeds with Invidio.us embeds (userscript)
+- [Invidious Downloader](https://github.com/erupete/InvidiousDownloader): Tampermonkey userscript for downloading videos or audio on Invidious (userscript)
 
 ## Contributing
 
diff --git a/shard.yml b/shard.yml
index 8172b9fe..02777233 100644
--- a/shard.yml
+++ b/shard.yml
@@ -13,7 +13,7 @@ dependencies:
     github: detectlanguage/detectlanguage-crystal
   kemal:
     github: kemalcr/kemal
-    commit: b389022
+    commit: afd17fc
   pg:
     github: will/crystal-pg
 
diff --git a/src/invidious.cr b/src/invidious.cr
index 73bfd405..b98c6fd6 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -216,26 +216,7 @@ get "/api/v1/comments/:id" do |env|
       halt env, status_code: 500, response: error_message
     end
 
-    if format == "json"
-      next comments
-    else
-      comments = JSON.parse(comments)
-      content_html = template_youtube_comments(comments)
-
-      response = JSON.build do |json|
-        json.object do
-          json.field "contentHtml", content_html
-
-          if comments["commentCount"]?
-            json.field "commentCount", comments["commentCount"]
-          else
-            json.field "commentCount", 0
-          end
-        end
-      end
-
-      next response
-    end
+    next comments
   elsif source == "reddit"
     begin
       comments, reddit_thread = fetch_reddit_comments(id)
@@ -598,7 +579,12 @@ get "/api/v1/channels/:ucid" do |env|
   end
 
   page = 1
-  videos, count = get_60_videos(ucid, page, auto_generated)
+  begin
+    videos, count = get_60_videos(ucid, page, auto_generated)
+  rescue ex
+    error_message = {"error" => ex.message}.to_json
+    halt env, status_code: 500, response: error_message
+  end
 
   client = make_client(YT_URL)
   channel_html = client.get("/channel/#{ucid}/about?disable_polymer=1").body
@@ -711,6 +697,7 @@ get "/api/v1/channels/:ucid" do |env|
               json.field "published", video.published.to_unix
               json.field "publishedText", "#{recode_date(video.published)} ago"
               json.field "lengthSeconds", video.length_seconds
+              json.field "liveNow", video.live_now
               json.field "paid", video.paid
               json.field "premium", video.premium
             end
@@ -738,7 +725,12 @@ end
       halt env, status_code: 500, response: error_message
     end
 
-    videos, count = get_60_videos(ucid, page, auto_generated)
+    begin
+      videos, count = get_60_videos(ucid, page, auto_generated)
+    rescue ex
+      error_message = {"error" => ex.message}.to_json
+      halt env, status_code: 500, response: error_message
+    end
 
     result = JSON.build do |json|
       json.array do
@@ -768,6 +760,7 @@ end
             json.field "published", video.published.to_unix
             json.field "publishedText", "#{recode_date(video.published)} ago"
             json.field "lengthSeconds", video.length_seconds
+            json.field "liveNow", video.live_now
             json.field "paid", video.paid
             json.field "premium", video.premium
           end
diff --git a/src/invidious/comments.cr b/src/invidious/comments.cr
index a699aaac..f4398b58 100644
--- a/src/invidious/comments.cr
+++ b/src/invidious/comments.cr
@@ -58,7 +58,7 @@ end
 
 def fetch_youtube_comments(id, continuation, proxies, format)
   client = make_client(YT_URL)
-  html = client.get("/watch?v=#{id}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en&disable_polymer=1")
+  html = client.get("/watch?v=#{id}&gl=US&hl=en&disable_polymer=1&has_verified=1&bpctr=9999999999")
   headers = HTTP::Headers.new
   headers["cookie"] = html.cookies.add_request_headers(headers)["cookie"]
   body = html.body
@@ -83,7 +83,7 @@ def fetch_youtube_comments(id, continuation, proxies, format)
             proxy = HTTPProxy.new(proxy_host: proxy[:ip], proxy_port: proxy[:port])
             proxy_client.set_proxy(proxy)
 
-            response = proxy_client.get("/watch?v=#{id}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en&disable_polymer=1")
+            response = proxy_client.get("/watch?v=#{id}&gl=US&hl=en&disable_polymer=1&has_verified=1&bpctr=9999999999")
             proxy_headers = HTTP::Headers.new
             proxy_headers["cookie"] = response.cookies.add_request_headers(headers)["cookie"]
             proxy_html = response.body
@@ -140,8 +140,8 @@ def fetch_youtube_comments(id, continuation, proxies, format)
   headers["content-type"] = "application/x-www-form-urlencoded"
 
   headers["x-client-data"] = "CIi2yQEIpbbJAQipncoBCNedygEIqKPKAQ=="
-  headers["x-spf-previous"] = "https://www.youtube.com/watch?v=#{id}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en&disable_polymer=1"
-  headers["x-spf-referer"] = "https://www.youtube.com/watch?v=#{id}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en&disable_polymer=1"
+  headers["x-spf-previous"] = "https://www.youtube.com/watch?v=#{id}&gl=US&hl=en&disable_polymer=1&has_verified=1&bpctr=9999999999"
+  headers["x-spf-referer"] = "https://www.youtube.com/watch?v=#{id}&gl=US&hl=en&disable_polymer=1&has_verified=1&bpctr=9999999999"
 
   headers["x-youtube-client-name"] = "1"
   headers["x-youtube-client-version"] = "2.20180719"
@@ -264,6 +264,23 @@ def fetch_youtube_comments(id, continuation, proxies, format)
     end
   end
 
+  if format == "html"
+    comments = JSON.parse(comments)
+    content_html = template_youtube_comments(comments)
+
+    comments = JSON.build do |json|
+      json.object do
+        json.field "contentHtml", content_html
+
+        if comments["commentCount"]?
+          json.field "commentCount", comments["commentCount"]
+        else
+          json.field "commentCount", 0
+        end
+      end
+    end
+  end
+
   return comments
 end
 
diff --git a/src/invidious/helpers/helpers.cr b/src/invidious/helpers/helpers.cr
index 7fd33c25..240d5438 100644
--- a/src/invidious/helpers/helpers.cr
+++ b/src/invidious/helpers/helpers.cr
@@ -296,3 +296,55 @@ def extract_items(nodeset, ucid = nil)
 
   return items
 end
+
+def create_response(user_id, operation, key, expire = 6.hours)
+  expire = Time.now + expire
+  nonce = Random::Secure.hex(4)
+
+  challenge = "#{expire.to_unix}-#{nonce}-#{user_id}-#{operation}"
+  token = OpenSSL::HMAC.digest(:sha256, key, challenge)
+
+  challenge = Base64.urlsafe_encode(challenge)
+  token = Base64.urlsafe_encode(token)
+
+  return challenge, token
+end
+
+def validate_response(challenge, token, user_id, operation, key)
+  if !challenge
+    raise "Hidden field \"challenge\" is a required field"
+  end
+
+  if !token
+    raise "Hidden field \"token\" is a required field"
+  end
+
+  challenge = Base64.decode_string(challenge)
+  if challenge.split("-").size == 4
+    expire, nonce, challenge_user_id, challenge_operation = challenge.split("-")
+
+    expire = expire.to_i?
+    expire ||= 0
+  else
+    raise "Invalid challenge"
+  end
+
+  challenge = OpenSSL::HMAC.digest(:sha256, HMAC_KEY, challenge)
+  challenge = Base64.urlsafe_encode(challenge)
+
+  if challenge != token
+    raise "Invalid token"
+  end
+
+  if challenge_operation != operation
+    raise "Invalid token"
+  end
+
+  if challenge_user_id != user_id
+    raise "Invalid token"
+  end
+
+  if expire < Time.now.to_unix
+    raise "Token is expired, please try again"
+  end
+end
diff --git a/src/invidious/mixes.cr b/src/invidious/mixes.cr
index 66f7371d..688a8622 100644
--- a/src/invidious/mixes.cr
+++ b/src/invidious/mixes.cr
@@ -26,7 +26,7 @@ def fetch_mix(rdid, video_id, cookies = nil)
   if cookies
     headers = cookies.add_request_headers(headers)
   end
-  response = client.get("/watch?v=#{video_id}&list=#{rdid}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en", headers)
+  response = client.get("/watch?v=#{video_id}&list=#{rdid}&gl=US&hl=en&has_verified=1&bpctr=9999999999", headers)
 
   yt_data = response.body.match(/window\["ytInitialData"\] = (?<data>.*);/)
   if yt_data
diff --git a/src/invidious/playlists.cr b/src/invidious/playlists.cr
index d85084eb..c1adb1d9 100644
--- a/src/invidious/playlists.cr
+++ b/src/invidious/playlists.cr
@@ -30,7 +30,7 @@ def fetch_playlist_videos(plid, page, video_count, continuation = nil)
   client = make_client(YT_URL)
 
   if continuation
-    html = client.get("/watch?v=#{continuation}&list=#{plid}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en&disable_polymer=1")
+    html = client.get("/watch?v=#{continuation}&list=#{plid}&gl=US&hl=en&disable_polymer=1&has_verified=1&bpctr=9999999999")
     html = XML.parse_html(html.body)
 
     index = html.xpath_node(%q(//span[@id="playlist-current-index"])).try &.content.to_i?
@@ -187,7 +187,7 @@ def fetch_playlist(plid)
   author = anchor.xpath_node(%q(.//li[1]/a)).not_nil!.content
   author_thumbnail = document.xpath_node(%q(//img[@class="channel-header-profile-image"])).try &.["src"]
   author_thumbnail ||= ""
-  ucid = anchor.xpath_node(%q(.//li[1]/a)).not_nil!["href"].split("/")[2]
+  ucid = anchor.xpath_node(%q(.//li[1]/a)).not_nil!["href"].split("/")[-1]
 
   video_count = anchor.xpath_node(%q(.//li[2])).not_nil!.content.delete("videos, ").to_i
   views = anchor.xpath_node(%q(.//li[3])).not_nil!.content.delete("No views, ")
diff --git a/src/invidious/videos.cr b/src/invidious/videos.cr
index 25ee2770..a0fb7f22 100644
--- a/src/invidious/videos.cr
+++ b/src/invidious/videos.cr
@@ -546,7 +546,7 @@ def fetch_video(id, proxies)
 
   spawn do
     client = make_client(YT_URL)
-    html = client.get("/watch?v=#{id}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en&disable_polymer=1")
+    html = client.get("/watch?v=#{id}&gl=US&hl=en&disable_polymer=1&has_verified=1&bpctr=9999999999")
 
     if md = html.headers["location"]?.try &.match(/v=(?<id>[a-zA-Z0-9_-]{11})/)
       next html_channel.send(md["id"])
@@ -620,7 +620,7 @@ def fetch_video(id, proxies)
           client.connect_timeout = 10.seconds
           client.set_proxy(proxy)
 
-          html = XML.parse_html(client.get("/watch?v=#{id}&bpctr=#{Time.new.to_unix + 2000}&gl=US&hl=en&disable_polymer=1").body)
+          html = XML.parse_html(client.get("/watch?v=#{id}&gl=US&hl=en&disable_polymer=1&has_verified=1&bpctr=9999999999").body)
           info = HTTP::Params.parse(client.get("/get_video_info?video_id=#{id}&el=detailpage&ps=default&eurl=&gl=US&hl=en&disable_polymer=1").body)
 
           if info["reason"]?
@@ -641,7 +641,19 @@ def fetch_video(id, proxies)
   end
 
   if info["reason"]?
-    raise info["reason"]
+    html_info = html.to_s.match(/ytplayer\.config = (?<info>.*?);ytplayer\.load/).try &.["info"]
+    if html_info
+      html_info = JSON.parse(html_info)["args"].as_h
+      info.delete("reason")
+
+      html_info.each do |k, v|
+        info[k] = v.to_s
+      end
+    end
+
+    if info["reason"]?
+      raise info["reason"]
+    end
   end
 
   title = info["title"]
@@ -699,7 +711,7 @@ def fetch_video(id, proxies)
     sub_count_text = "0"
   end
 
-  author_thumbnail = html.xpath_node(%(//img[@alt="#{author}"]))
+  author_thumbnail = html.xpath_node(%(//span[@class="yt-thumb-clip"]/img))
   if author_thumbnail
     author_thumbnail = author_thumbnail["data-thumb"]
   else