(Again, no benching expert), but from experience with bands from the bottom, be weary of using round-edge DBs (which I think you are in the video). If it looks like they might roll at any point then anchor them down with plates. It clearly wasn't a problem here, but I had one roll mid-set and it ended up nasty.
My preference is reverse bands. Been using them on bench and incline for the last month or so. Feel great on my shoulders. Give them a go.