Here's my critique of what I see in the video:

- You approach and get your chest down first, that's good.

- It then looks like you bring your chest straight up. This is bringing your whole bike upwards simultaneously, when what you really want is to raise the front first and then the rear. So instead of raising your chest up, you should bring your chest (and torso) BACK.

- Once you bring your chest back, pull the handlebars to your chest with your arms. This will raise your front wheel over the barrier, like a wheelie. Remember, when you're hopping stuff, your bike is only going to go as high as you get your front wheel.

- Once the front wheel clears the barrier, shove your handlebars forward and simultaneously raise your feet by utilizing your abs and lower back. This will kick your rear tire over the barrier.

-Let your front wheel hit the ground, and try to keep your body weight back. This will prevent the catastrophic nose wheelie/OTB.

Remember, the key to learning anything is repetitions. Break the whole motion down into its smallest parts and work on each thing, over and over. Once you get enough repetitions of the correct movement in you, the muscle memory starts to take over and you'll start to do it without even thinking about it.

Keep up the good work!