Regarding the instances page, it looks like they're pulling instances randomly, which would just be confusing to new users and in cases like you mention where the instance isn't popular, counterproductive.
The frontpage isn't much better - most of it is taken up explaining free software politics and things "normal" users won't care about, and it offers only three content examples - one video, one channel and one instance. Compare that to Youtube's frontpage, which is tiles and tiles of content, with a search bar right on top, basically choking you with content.
I understand they probably care more about the politics and philosophy but if they want to be an alternative to Youtube they need to do what Youtube does and present themselves as content first. The layout for the instances themselves do that, but the homepage needs to pull a bit more weight in that regard, since it's standing between the user and all that stuff. In my humble and unqualified opinion.