Many youtubers will make a video about this great project ... trust me, these people will see the potential too.
I think that in truth it would be nice if they collaborated with YouTube bloggers, this is a relevant way to attract real investors.
This is not always an up-to-date method, there is a suitable time for this, and now many projects are doing this to advertise themselves on YouTube, so you need to show a different marketing strategy to attract people