TBH, does it matter if it's not genuine? You'd send it back?
Most of the youtube videos seem to be full of people who are amateurs/noobs putting on a screen protector
What you really need.
1. Screen cloth
2. Screen protectors
3. Scotch tape (I saw sellers in HK use random brands)
so... what to do.
1. Clean screen with cloth till you see no dust or anything (as well as you can anyways)
2. Apply the screen protector as you see in the vid. Peel a corner of the plastic (not all), stick the corner and push across slowly across. Pull off and reapply if necessary, but do so slowly.
3. Take 2 pieces of scotch tape. Use 1 to lift protector, use second and stick any dust particles that you may see under the protector. (Main reason you get air bubbles). LIft and stick, lift and stick. (lifting doesn't need much replacement, sticking one may need to be replaced several times). Do so until all dust particles are gone.
4. Flatten out with a CC or something like that but generally this step is not necessary if you got all the bubbles out, just wipe with microcloth to give a little pressure. If you see bubbles, 99% of time it's a dust particle, and a CC merely squashes the sticky stuff on the particle and sometimes makes the particle shift.
Most vids don't have steps 3 and 4.
http://www.youtube.com/watch?v=d9x7W3p6x5E&feature=fvwThink this, but go as far as you need. The "pros" were removing particles as they slowly moved the protector down and unpeeling the protector to do it, but I saw some of them put the whole thing down and then lift it back up (more common). I'd recommend the latter since you don't know what to do and allowing the sticky part to touch your hand is even worse since fingerprints can show up underneath.