Not only that - the clues are:
The Phantom 4 doesn't record sound and at the beginning of the video you hear the motors start up.
P4 motors do not sound like that!
Either way - total stupidity and the operator only serves to water down the gene pool.
I went to my local rc hobby store in NC. Nobody heard of 400 feet. I think the local area record was 1400 ft. I thought I was a wild boy.
Skeletons in your closets