which is the easiest way to download Youtube videos to a computer, with minimum of fuss ?

Rock's right. Try the Youtube Video and Audio Downloader https://addons.mozilla.org/en-us/firefox/addon/you... add on.

It adds a download button below the embed link. There are many others. I'd get a couple. I am still figuring this one out. If I download a few videos at a time everything is fine. I tried to download 8 at a time and 2 failed. I was also downloading from Origin and Steam gaming clients. Not sure if youtube or firefox thought the downloads were taking too long or what.

Except extensions, you may try some programs too. A lot of programs only require the link of video. 5kplayer, works fine for me. Anyway, copy the link and paste in the analyse section, you can get the job done.

there are several extension for firefox that do just that (youtube video and audio downloader for instance), just look them up and install the one that is easiest for you.

don't try it on chrome cause it won't allow you