nice footwork and mobility. looks young so 14 is believable. probably in the 6'10" to 6'11 range as the video on yahoo actually says 6'11 (billed as a 7 footer).
he's got the body type of manute bol, which makes it easy to picture him growing to 7'5+, however, he could very easily end up a 7 footer at maturity (which would probably be the best thing for his body and his game). remember derrick caracter was a 6'9" 15 year old and he's now a 6'9" pro.
doesn't seem to have great athleticism, which suggests he either doesn't possess it, or he really is 14 and will gain that over the next several years (which would be scary).