Proper HePU/HSPU form

I'm been looking for videos of the HSPU on youtube, but everyone does it different. Here is a video of my HSPU. Please comment on my form.

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I'd like to see a little bit ROM and make sure you open your shoulders as much as possible as you go back to the HS starting position.

in GB, I've seen the elbows out versus elbows in a few different varieties so it kind of depends.

What about my back? I shouldn't arch too much, right?

correct.

I think there is something to be said for doing the HSPU progressions with elbows in and flared out. Well, according to GB anyways. I'm sure it has to do with the preference for wide arm movements and developing the shoulder girdle.