YT-DLP always works great for YouTube and some other sites. There are also a few browser extensions around, called similar to Video Download Helper. But don't install the super fishy ones, I don't know which of them are good.
Piracy
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Media Downloader - https://github.com/mhogomchungu/media-downloader
It's a front end for yt-dlp, but lets you add other plugins too. I find it easier to use, because of the gui options :)
Tyvm!
I don't know that I've ever had jdownloader 2 fail to download a video- maybe give that a go.
95% of the sites I tried jDownloader works. Nice thing is, you can just copy and paste the URL if the site, no need to crawl for the video stream url.
Highly recommended
You don’t even have to paste 😉
"internet Download Manager". Stupid name , great tool. Not just for video-dl. Not free though, but only a fair pay-once.
yt-dlp and jdownloader.
I have had the most success with Firefox, grease monkey and media downloader
DVD is a good android app on fdroid, and 9xbuddy is a decent (though riddled with ads) web based solution.
Newpipe found on fdroid.org is also great.