[panopto] Add extractors (#2908)

Based on https://github.com/ytdl-org/youtube-dl/pull/13449
Closes #1946
Authored by: coletdjnz, kmark

yt_dlp/extractor/extractors.py

@@ -1152,6 +1152,11 @@ from .palcomp3 import (
     PalcoMP3VideoIE,
 )
 from .pandoratv import PandoraTVIE
+from .panopto import (
+    PanoptoIE,
+    PanoptoListIE,
+    PanoptoPlaylistIE
+)
 from .paramountplus import (
     ParamountPlusIE,
     ParamountPlusSeriesIE,