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.

Maybe it's me as I realize that my skills in this area may not be comprehensive enough to use this extension but I installed it with no problem. Then I tried it and it said I needed a companion app and gave me two options for that. I tried both options, even having to tweak my security settings to allow the .pkg file extension. Then it finally allowed me to choose the format/conversion except being a laymen there are so many options that seamed so similar like mp4 1mb vs mp4 2mb. So by one I tried the ones I recognized as to not overload/overburden my macbook or the server or whatever can get overloaded. None of the formats, not even one actually downloaded. I gave up, tried another similar extension. One click to download the extension, then one click to select the format then a third and final click to download the media. That's it! The other one worked. Maybe this extension is simply too sophisticated for my average/adequate skills. I'm assuming it's me but maybe this review will help developers think about us laymen when creating extensions in the future. Cheers!

Downloads any video or sound file. Very good.

Works fine for me.

Very good product, fairly easy to learn, many options for download.

made youtube videos unplayable

ottimo

Allows you to download ONCE and then every video afterward will require you to install a third party application - even if you go to download the same video again, demonstrating that it's not just a certain type of video that requires the "companion application"

This screams malware.

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.

facilitate people for operation

便捷好用

Works with pretty much any website or streaming service. The UI does take a while to get used to though

exelente

Great extension.

Super