This might be pretty easy to find because I think this boy is pretty popular. I have a brief clip of him from a black cock cumpilation vid on Pornhub. He's on the right half of the screen at 3:40. Link and pics below.
I'm sure I've seen a high quality 5 minute video that strung together multiple (at least 5) of the same guy's cumshots. It showed more of the build-up and included the full length of each of his orgasms. He obviously did many shoots because each pop-shot was a massive, full load of sperm. Another clue is that in two sessions you hear him begging "Please, sir, can I cum?" and in one the white guy pulls back to try and keep him edged but he can't hold his nut back and his big dick bounces up and down as he squirts hands-free.
What gets me so hard is that even without seeing face, you can tell he's really young, probably freshly 18. His voice, his skin tone, and especially his nips, are all giveaways he's a young buck. Also the obvious thickness and sheer volume of sperm he ejaculates along with the impressive number of squirts he manages -- few 20-somethings can pump out that much. https://www.pornhub.com/view_video.php?viewkey=ph5729fdda8133a