Not sure what do to next

[scag43]

Hi there, Please watch video to end to see engine problem, on video I’m playing with choke to keep engine running, (needs carb cleaning), problem is that if I past half throttle sound like the engine is losing compression, almost at the end of the video sound like air is coming out from somewhere Thanks

[video]https://drive.google.com/file/d/1oj6ZKo0sjTfkDihD4GfzZukFGJD_tAP0/view?usp=sharing[/video]