So far I've had good luck using this Firefox add-on. It's the go to application I use consistently. Many of the other programs I tried didn't work or were problematic. This one works fine.

Works great on many streaming sites. It takes a little getting used to and often mistakes ads for the intended video - but that may be on purpose by the sites in question to thwart download attempts.

good

このアドオンプログラムは最高です。気に入りました。いい感じです。。

Works on just about every website. Thanks very much VDH .

It has worked really well for me. Was able to download from a lot more websites than most of the other downloaders I've tried. The interface when downloading stuff is a bit confusing and cramped though. Could explain more clearly the difference between download options if there are any

Has worked really well so far. It doesn't seem to work in all websites though, but it is definitely handy for those that work!
It can add a QR code in some videos if you didn't buy it, which is a shame in my opinion.

easy to use, reliable.

its mostly great, but i wish there was a way to stop it from scrobbling anthony fantano videos lmao

so good

thanks

works very well on most websites

Works great on every site I have tried even YouTube!

Update: Doesn't work on YouTube at least for now, it keeps saying to install the companion app which is already installed but isn't recognized. Work around is to select the video and in the options click "details". It will provide the actual URL of the video and audio. Just open the url and you can save the video with just a right click. Merging is optional but only takes a few seconds using something like mkvtoolnix.