[Note: The following is purely a belief which has substantial evidence to prove it is fact.]
There are many communities where you can go to get feedback on your content. This is one of them.
However, most of those come with the side effect of Sub4Sub YouTubers and ones who will spam your comment section trying to get views/subscribers without caring for yours. All things accounted for, it is
The part where my note comes into play is the fact you will not find a new audience in those forums unless you are marketing towards YouTubers. On forums like this and others like it, you will find almost purely nothing but other YouTubers. YouTubers could be an audience, but unless you're intended audience is YouTubers, you'll have some long-term consequences that stem from advertising where they are most abundant. Two of those are unpredictable view patterns and inflated subscriber numbers.
Conclusion: They are good places to find feedback, horrible places to find an audience (for the majority of channels).