IMO anyone interested in developing their strength (that is physically able to deadlift) should learn how to do them safely and then work on them.
Rippetoe laying out how to do a deadlift: https://www.youtube.com/watch?v=rwQQZCi6OHA
I'll leave these here as I think they're both relevant to your point, in different ways:
I do think too many people go overboard with the olympic lifts. You don't have to be red faced and shaking to get a good pump from a deadlift. Just because you can lift the weight in some way 5 times, doesn't mean you should. I bet most people who are boasting about their >400lb dead lift can't do that movement for 3x10 reps with good form. Lower the weight and it's as safe as the dumbbell squat.
[edit]: took a quick look at that video you posted though and that's an amazing resource! I look forward to checking out more of there videos.