Tried to check out your vid, but don't have a 'gold' account, sorry :(
But I wouldn't be at all surprised if you can 'cum close' to this guys loads.
A year of two ago I would have been a bit more skeptical, but since then I have seen several guys on Xtube sites that could could cum several times, and others that could spurt damn near the same 30ml sized loads that this guy does. Not quite, but pretty close.
I suppose it makes sense that there would be wide variations like this in cum volume when you consider that, if a guys EXTERNAL parts can vary over a pretty wide range (between guys with a 3 or 4 inch erect penis to guys with 12 inches or more) - then why shouldn't the INTERNAL parts responsible for ejaculation also vary over a fairly wide range.
This is even more reasonable when you consider that we are talking VOLUME here, not just length. Think about the difference in the actual total erect fleshy volume between the cock of a guy with a 4 inch long 1 inch diameter erect penis, and a guy with a twelve inch long by 2 inch diameter monster (if I just did my math right, that would be about a 12 times more volume in terms of total cock-meat)
And a this guy's shot glass filling 30ml loads are actually only 3 to 6 times larger than the 5ml to 10ml many guys can easily manage. So if a guys EXTERNAL parts can vary by a factor of 12 or more in total volume, I don't see any reason why the INTERNAL parts responsible for ejaculation shouldn't be able to vary by only 3 to 6 times.
Just my 2 cents worth. Check out xtube and the other sites yourself, and if you watch enough vids, you will see what I mean. It's true that loads this massive are pretty damn rare, just like guys with 12 inch cocks, but they ARE out there.
I didn't notice from his profile on xhamster whether the 30ccSpermLoad guy is gay or straight, but either way, I assume he has had his cock sucked at least a few times, and have to wonder, the first time with a new partner, did he warn them what to expect? ... or just cut loose