Here are a few snatches from 50-100kg.
I'm a 36 year master lifter. My PR is 115 (last time I hit that was about 2 months ago).
I'm currently dealing with a deep pelvic bone bruise which keeping me from truly getting my hips into a pull. Any suggestions on keeping from jumping forward with a heavy weight?
suggestions on keeping from jumping forward with a heavy weight? - finish your pull and don't let the weight come on to your toes maybe (not that I'm suggesting either of these things are an issue for you)
Personally, I don't think the jumping forward is excessive with you. It seems to happen a bit more with the right leg than the leg so maybe there's a bit of an imbalance somewhere. I know I always rotate my left foot out more than my right when I catch my cleans and I don't think many people are perfectly symmetrical.
Look at this one of Dolega jumping backwards, he must jump 12inches nearly!
Really good job I reckon, especially if you're not able to maximise the hip drive at the moment.