You're young and Black so to him you're already looking crazy and out of place.
Then you walk up physically touching and drooling all over the car, grinning from ear to ear the whole time, never introduce yourself or ask his name, and you really think you was about to drive away in THAT THING?
Dude summed the whole scene up in a mili-second and was like HELL NO I'm not selling my baby to some reckless American kid whose going to do who knows what with it, just for "content".
You gotta understand- at a certain level of wealth and luxury, it becomes a privilege to purchase certain things. We've seen it with those "millie" watches I think? I think you literally have to fill out an application just to get approved to even buy one. Upscale private clubs. Old treasures and relics(like the car in this vid). Simply "having money" isn't enough after a certain level, and the young fella in the video doesn't seem to understand that yet.
That said, it very well could have simply been racism. But there's no way to know that for sure with what we're given and, quite frankly, I think the kid would've gotten the same exact treatment had he acted like that with an old Black man selling that particular car.