The idea is good. However only educational content should be used, in my opinion. Otherwise, the channel could face criticism for biased contents. Also, don't forget that Youtube isn't a platform you have a full control over it, you can expect to see someone trying to hijack the channel.
If you're really interested with video content for the community, why not host it yourself with the forum ( a subdomain for example or a video board here)
As for the funds, why not make it based on volunteering. If someone is interested to make videos for the community it should make it without any incentive.
Youtube is an excellent way to get new users. There's billions of people in Youtube that would never bother finding the forum by themselves on Google. In a way Youtube is the new Google, a lot of people just search on the Youtube bar and consume audiovisual content and cannot be bothered with Google anymore.
Im sure that if more people knew this is the original forum and satoshi posted here, they would become really interested. It's a good selling point, I would definitely market that to get people into my forum, no other site can claim that.
Also being aware that you can earn some satoshis posting is also a good selling point, and they will have an incentive to do good since as you ascend your account you can get selected for better bounties, I don't see anything wrong with marketing that side too. If you don't do it then Roger Ver will do it and get all the traffic into his forum.
But I would definitely prioritize on account recovery setup and help everyone recover their accounts above the Youtube channel project.
Btw; I would also like to see more usage of the Twitter account, a lot of times the site is not usable, it would be cool to know what is going on.