74 Mav running rough

74 Mav 200 carter yf carb any help would be great thanks guys. Take a look at the vid.

 

Choke should have been wide open.Sounds like its good and hot.

 

So the choke should be wide open when car is hot?

 

Adjusted the chocke. I am noticing that the timing is jumping around everywhere. Re-adjusted the timing. Now it's between 6-3.

 

But still the RPMs drop in drive.

 

Almost sounds like it has a vacuum leak.

 

Checked all hoses all seam fine no leaks