martin3
I get the same result with mpd downloader

.. because errors while remuxing ads
"[CefMedia] Non-monotonic DTS; previous: 43760640, current: 43584512; changing to 43760641.
This may result in incorrect timestamps in the output file.
And with paid content there are no ads - so this should not affected ..
.. and SF offer only DRM Downloader for this, because
untouched yt-dlp don’t support encrypted content
ERGO: free content works with YT DL fine ..
.. and paid (encrypted) content with DRM DL with Video Format mkv(mkvtoolnix)
I don’t understand why a working method shouldn’t be sufficient.
Please note: It’s an Universal Downloader - not a VIP Service