I have a sub but they did that new thing where you can't download anything until you've been subbed for a while (the 90 day sub policy).
Also if the above doesn't work you could try "view page info" and then look in the media tab for a video file or stream.You must be registered to see the linksworks for most blocked videos for me. Could also do (Ctrl shift I), go to network and check if you can go to the source video link. If everything else fails, just download obs and screen capture it.
Please help us out here if you can!