Joe, if I may add a little to what Brett said, consider that there are three good stances for deadlifting: conventional, narrow sumo, and regular sumo, which we could call wide sumo.
What you're showing in your video amounts to wide conventional - not a good choice. You might consider narrow sumo, which from what I see in your video would mean only a slightly wider stance if wider at all, but with your arms inside your legs. And unless the program has changed, narrow sumo is what's being taught at the SFL certification.
-S-