That kind of DL will do you little good. You didn’t even need to post those vids to know that is bad technique. Funny thing, is you could probably pull 4 plates and quarters is you used good technique.
Read up on Dave Tate and Jim Wendler for tips on DL form. It is an easy lift to make progress on. I like it and have used it as a squat alternative (though still keep front squats).
Tips:
1. Get shins as close to bar as possible
2. Hips and shoulders move together
3. Lean back a little as you pull
4. Imagine you’re driving your heels into the floor
5. Really focus on extending your hips once the bar reaches your knees