Good shots! I'll throw out a few tips, even though I'm as much a neophyte as anyone else.
-Shorter is better. Like way shorter. Try watching some other youtube videos of 1+ minute drone shots of a single subject. Your attention span is worn out by about the first 30 seconds. Also try cutting your footage into a bunch of bite size (like under 5 second) clips and try to use them cohesively somehow.
-What program did you use to edit the clips and add music? If it can do a little color correction, use it. Just bumping the exposure on your clips in the video could really help it out- that's a cool subject, but the light was pretty drab that day, with a little work it could pop.
-It's hard, but try to find a spot to fly the drone that's not in your shot, or well hidden. On your POI circle clip I was continually drawn back to you walking around instead of the subject.
-Did I mention shorter?
Great start! The more you fly and edit your content will automatically improve. Watch tons of tutorials on editing and flying.