How to download videos from Youtube?

I want to download Youtube videos to my computer, but I don't know how to do it. Is there a good service with this kind of functionality?

It's a problem, of course, you can't argue with that. And in addition, I was in a similar situation, until I was advised to https://easytube.pro/ . Here you can not only download videos from Youtube, but also convert them to the desired quality: high, medium and low and save the result on your device. By the way, you don't need to register here, all the functionality of the site is available without an account.