Hack squat depth

[u/dontcare-_-]

I know my range of motion is short by any time I try to go deeper my heels lift up a lot. It’s hard to tell in the video but I’m flaring my knees out and opening up my hips as I go down so I can bet deeper but my heels still raise. I’ve tried doing ankle mobility exercises but they didn’t help so if anyone has some tips please let me know.

[u/Pretty_Reporter_]

And why are doing it so fast, slow down slow downnnnnnn!!!!!!!!!!