Opera addons store doesn't have this restriction, so some addons have proper versions there, e.g. I use Flash Video Downloader I obtained there.
I think even in US the law mandates that one is free to make a backup copy of things available to him. Though, I'm sure downloading videos breaks YouTube's ToS which you sign upon registering (if you do register at all), but that's an issue only between the user and YouTube I guess.
I think even in US the law mandates that one is free to make a backup copy of things available to him. Though, I'm sure downloading videos breaks YouTube's ToS which you sign upon registering (if you do register at all), but that's an issue only between the user and YouTube I guess.