[rodalpho]

Basically, it's Google's fault.

Every non-official YouTube client gets a client API key, and every call to YouTube uses a different number of API calls. Each key gets a quota of those calls per day, and when it exceeds that quota YouTube simply denies it with that error message. The YouTube addon actually has two API keys right now, that's why you needed to sign-up twice when you first installed the addon; I believe it uses one for searches and one for everything else.

So the only real mass-market solution is to make people sign up 3 or 4 times at youtube.com/activate rather than just 2. And as Kodi grows ever more popular, eventually we'll be signing up 20 times or more. It sucks. You kinda can't blame Google, because the YouTube addon doesn't play their ads, so why should they care about our convenience? But still, it sucks.

I've asked several times for the ability to use my own API key, because I don't mind editing config files and whatnot, but Bromix doesn't want to do it. And just to be clear Bromix is amazing and working for free, it's his addon and he can do whatever he chooses, has no obligation to listen to anyone, and I have zero problems with that. I'm just sayin'.