I have been working on backflips, front flips, and all other stuff. I know the replay is 5000 frames but I only do 1 backflip, also I could do a better landing. So tell me what you guys think ^_^ Also I will be updating this thread!

Stiff, ugly. And you went WAY too high to make something even semi enjoyable. Nothing good about. Nothing unique, I could go and replicate it right now.

I took your advise and done a relax all backflip. I started off the same but then relaxed all and made it slightly better.

I don't really see much of a difference on this one.
Everybody toe jumps these days, but I have no right to complain as I do these sometimes.
Anyway, your arms are a bit stiff. If you were just gonna do a simple flip like that, why jump so high? I guess it can't be helped on -22 grav.
Also, using relax all won't make a replay look better. It's like putting a polar bear in the savanna. It simply won't blend in well with everything else. It's necessary to know when to relax or hold a joint to make a replay look better.
I can't really say much else since it's just 1 flip. Try to do more and I'll reply with more.