My setup is basically the same as what you had in the video. Except that I use +100lb dumbbells. They are held up by the edge of the platform. And they're round dumbbells. Hexagonal ones might even work better...same difference at least. You're lifting on the same platforms that are at my gym, I think. I don't know if that helps at all. Should be pretty secure...I've seen people doing banded deads with +300. What you had is perfectly fine. Just thought I'd throw in my 10 cents. I'll be doing deficit deadlifts soon also.
