Yeah, overall your form looks pretty good. With regards to DL's I would say to have a play and feel out what seems to be best for you. I've been told many times to try and get more leg drive by lowering my hips ~ I have managed to lower them a little but biomechanically I seem to be suited to a slightly higher hip position (helps that I have a very strong lower back and erectors).
The benefit of being able to get your hips down is that you can recruit more leg drive and you take a little of the lower back out of the workload. Works well for a lot of people as the legs are naturally going to be stronger, but there's still some people that can pull huge weights with a high hip position (check out the pic below of Richard Hawthorn for one prime example).
He has pulled over 600lb at a bodyweight in the low 130's, proof that biomechanics is the deciding factor at the end of the day. I also like to have my hips a little higher than what a lot of coaches would say is optimal, it's all about finding out what is best for you and that's why I suggested you have a play around with a few positionings mate.
Finally you should be making sure you do back and front squats (front squats done Oly style rather than cross handed). These are two exercises that will have the greatest carry over for pulls. You want to hit the movements which will improve your posterior chain (calves, hams, glutes, and lower back) so I'd be looking at movements such as RDL's, SLDL, lunges, glute ham raise, back and front squat, behind the back pulls (old school hacks), step ups, good mornings etc etc.
Overall your lifts looked pretty good, well done!