I'm not a scout, so I won't analyze the video, but a few things to note...
1) The kid had offers to play pro ball in Belgium and France, and also had strong interest from Gonzaga, Creighton and Florida State (according to him).
2) He was listed at 5'9" last summer as a 16-year old, and says he is still growing. There's no telling what is or isn't accurate, but one of the main Euro sites/Twitter feeds said he was 6 feet. If the kid says he is 5'11", I'd expect that a 5'11" kid will show up on campus.
3) The results speak pretty well for themselves, regardless of what the video showed. He played 27 minutes per game for Belgium's U18 team and 20 minutes for their U20 team last summer, at 16.
4) Eurobasket gives the kid a 5 out of 5 for potential.