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.