I don't know about the FH kid, but after seeing Navy Jones earlier this year I think he's in the same category speed wise as the guy in the video. Also, Salem's Donte Clayborne has jets comparable to Jones. Jones Hudl page has 40 time listed as 4.44, Clayborne's Hudl page has 40 time listed as 4.40 for what it's worth. Don't know who puts the information in for the Hudl pages and how accurate they are, but the eye test to me says they are all close in speed.I really don't pay too much attention to these 40 times. In HS, they're not close to actuals.
Here's the deal to give you perspective. I'm sure this guy is fast. Not saying otherwise but here is a video of a HS player I've put up more than once. He did go D1 and did well. His best NFL combine time was 4.42. If you think he's faster than Stevie, you've really got something at FH.