I'm definitely not qualified to give advice on barrel riding, but you can upload a video by using the "picture" icon (yeah, I know, it's confusing) however it's easier to upload it to YouTube and post the link in here.
PS your kid looks pretty impressive 👍
Commented on Surf Skate on Dryland-Have any of you...
28 Oct 11:47
I've certainly found that practising in a bowl helps, because it makes me concentrate on getting stacked over the front foot and looking where I want to go.
Check out the 12 week programme, (week 7, I think), for surfskate drills.