I can’t see the video, but I think more is almost always better. I have some LPS, alveopora and hammer, that are getting blasted by an MP-40 that have great extension. As long as it doesn’t look the like coral is retracting because of the flow, you can probably add more.
I can’t see the video either. If SPS, don’t be afraid to blast. For LPS, they will show you if they’re not happy by closing up. I prefer lots of flow with random movement. You’d be surprised by how much flow corals can take. The ocean is a beast and I see so many tanks these days with hardly any flow.