hmm, it looked like you pulled the weights up before you dropped them, it that intended, or not? I really can't say that it is bad form, because I don't know what the correct form is, and thanks for posting the video
thats what i pictured the exercise to look like. looks good i tried it before with a bar didnt feel anything with it though. i might do it in the off season but right now i proly will stick with more lunging and plys and squats.