[devalue] fromisoformat is no good pre-3.11

Authored by: bashonly

yt_dlp/utils/web/devalue.py

@@ -6,6 +6,8 @@ import datetime as dt
 import math
 import re
 
+from .._utils import parse_iso8601
+
 TYPE_CHECKING = False
 if TYPE_CHECKING:
     import collections.abc
@@ -87,7 +89,7 @@ def parse_iter(parsed: typing.Any, /, *, revivers: dict[str, collections.abc.Cal
 
                 elif value[0] == 'Date':
                     try:
-                        result = dt.datetime.fromisoformat(value[1])
+                        result = dt.datetime.fromtimestamp(parse_iso8601(value[1]), tz=dt.timezone.utc)
                     except Exception:
                         yield ValueError(f'invalid date: {value[1]!r}')
                         result = None