yeah, take it bigger. also don't open up. the first one was the closest. you didn't set it as backflippy as the other ones and you stayed tucked up. do what you did in the first clip except take some more speed into the jump and you'll have it for sure
dude just drop ur shoulder and just keep a fluent motion. u kinda tried to whip it when u were in the air at the last second if u maintain the same form in the air u should be fine unless ur doing a shifty. 9/10 for the effort though