Nice lifts, no major problems, IMO. On the first snatch video the bar tracks around the knees slightly, but you manage to get it back to you prior to the 2nd pull.
As effortless as 50kg looked, and your pull at 60kg, there is no reason you shouldn't be lifting in the 70kg range. Maybe post a video at 60+kg? Any real problems will standout when you approach your max.
Snatch and Clean both look solid. On the jerk, the biggest thing may be dropping your back knee slightly. This should allow your hips to get lower when you receive the jerk overhead at lockout. You may also want to experiment with keeping your elbows lower prior to the jerk. Almost pointing toward the platform.
Good lifting, now its just time to get after it...