One of the commenters makes a great point about safety:

I just finished watching your video. I see you’re wearing goggles. THANK YOU so much! I’m glad to see somebody out here understands and respects the dangers that powerful lasers represent. I went to college study Laser and Photonics Technology and am grieved by how cavalier people are with these high powered lasers. An accident is bound to happen. I wish somebody would specifically make a laser safety video explaining why goggles, beam stops, and safety placards are necessary for operating lasers. I wish somebody would explain power levels, CDRH regulations, laser power classes, (I-!V) and the hazards of varying wavelengths of light and what parts of the eye they affect most. Sadly I don’t have the time or means to do it. And I expct even if I did some puffed up know it all would argue. Thanks again though…not only for showing us the awesome laser but for publicly displaying proper laser safety.

This commenter power trip is skeptical that he could make this at home:

Seems fake. At least the color was for more effect it seems. If this is true, tell me where to get this exact diode. If you don’t reply with an answer as to where to get this exact diode, you admit your video and laser is fake.

I can’t say for sure but styropyro seems to know his stuff so until proven otherwise I will assume it is legit!