When I began skydiving (not very long ago at all) we were always told, "as long as you walk away it was a good skydive". While aware of the naivete of that comment, it is disappointing to see that someone with just an extensive skydiving career, feels they need to debase another skydiver to tout their own self esteem. If you are interested enough to critique the jump with such detail, then you should also find positives and have a rational, not banshee worthy, conversation to help out this skydiver. In short, climb on out of that ivory tower. It's easy to find negatives in anything, tell me what he did right. That....is how people learn. Not by criticizing at hyena frequencies.
To the skydiver, nice to see you motivated to try new things i.e. back flying albeit a bit low, nice job avoiding the wire on that house, and lastly, thanks for posting an "educational" video for us all.