Holley/Demon Carb stumble

It's hard to see in the video, but it looks to me like your squirters are too small. IOW's...the pump shot is way too long. It looks like the booster has taken over and the pump shot is still going.

Also, it may be my new glasses and old eyes, but I thought I saw several times where fuel came out of the squirters without the throttle moving.

There are little brass needles that are chrome plated that go under the nozzle. If those aren't in there, you can get a siphon going and pull fuel out of the nozzle.

Just what I saw.