What would that achieve? You get a video file off of him and you do with that exactly what? How would you get an audience for the video file? And what would you ask that guitarist to say? I've never heard of DragonForce so probably some obscure band?
Dragonforce is one of the most loved bands by actual musicians from my knowledge. Very aggressive guitars and vocals, like Metal. Also, I would say you could get several "Celebrities" To do it and make a PSA about it our of it. So long as they actually give a clear measure of what too loud is, and relate that to everyday experience, it should serve at least as an effective warning. If you want to get more awareness of tinnitus, you would have to get someone who experiences it more I would say.
Again, I'd probably try to get just a message of protecting your hearing, cause it's precious, and that modern electronics ARE set too loud for regular consumption, and not beat around the bush with "Oh, well, 60 minutes at 60% volume." But that Speakers at concerts and max volume earbuds are roughly 120db, which does permanent hearing damage in 30 seconds. You should wear ear protection to concerts, especially if you're near the speakers, and take breaks. Look into volume limiters on your phone, and talk to your doctors about any hearing concerns. If you don't head these warnings, you can end up with hyperacusis, tinnitus, and visual snow. Probably mention that 1/4 American Adults that say they have good hearing have hearing damage.
It wouldn't be as great as a tinnitus awareness campaign, but to get people to actually take hearing damage seriously, you need to give them the terrible effects of it besides. Will.I.Am may be bad at taking tinnitus seriously, but Huey Lewis has it bad, and doesn't bad talk it.