Given the number of threads in Meta over the last few days/weeks/months complaining about the state of the forum, the ridiculous levels of bounty spam, asking for more mods and suggesting about 100 other ideas for improvement, would it not be wise to focus on the forum first before taking on a new project?
I agree that now it would be worthwhile to focus on improving the forum, rather than attracting new users, especially since there are no issues with the flow of new participants, but the problems with the quality of their content definitely exist. In addition, if you need to find enthusiastic participants who will not only do their job well, but also deserve your trust to implement your idea with a YouTube channel, then to implement a number of projects that have been repeatedly proposed in the Meta branch, you already de facto have a team consisting of conscious members of the forum who want to put things in order and make bitcointalk better. I think it would be more reasonable to focus on the qualitative changes within the forum itself, as there are problems and they need a solution. And most importantly, there are experienced people who are ready to help you in this already now.