Aaaaw.
I would really like to help you but I don't quite understand what you mean exactly? I can post a comment in his video just fine.

He disabled comments. You can't unless he approves it.

Write something like "Poods you're fabuloos <3"

Comments on that video are not disabled. I dont know what the problem is.

I've experienced the same thing - I'm the only one who can see my comments
I think he has to approve it, although I can see thousands getting miss as it would take all day to sit through all the comments

It's a shame, I wish we could be more connected but his channel is so big it must be almost impossible to keep it up.

i think there is a system on pewds channel where he approves for legit comments.