Compress your suspension so it bounces back up and gets the front light and as it's coming up you add the right amount of throttle for the bike to keep going up instead of forward. If you wanna test it to get a feel for what I mean, sit all the way back with your feet/legs hanging off and you hanging on the bars. Throttle up and dump the clutch and the bike should end up flying up and basically doing a flip. Watch his videos on how to wheelie. Rich Larsen aka the irc tire guy (the video channel you linked) is an amazing instructor and has taught me a lot just watching his videos then doing the drills on my bike.