[PeekVids, PlayVids] Add new extractor (#29765)

* Merge back-port from yt-dlp
* Merge features from PR #29798
* Improve metadata extraction

Co-authored-by: dirkf <fieldhouse@gmx.net>
Co-authored by: AXDOOMER

youtube_dl/extractor/extractors.py

@@ -909,6 +909,10 @@ from .parliamentliveuk import ParliamentLiveUKIE
 from .patreon import PatreonIE
 from .pbs import PBSIE
 from .pearvideo import PearVideoIE
+from .peekvids import (
+    PeekVidsIE,
+    PlayVidsIE,
+)
 from .peertube import PeerTubeIE
 from .people import PeopleIE
 from .performgroup import PerformGroupIE