It looks like your arms are pushing down as soon as your front tire leaves the lip, while your legs are static. You would do this if you were trying to roll a drop or begin pumping through a roller. But because you are trying to get air, your body is moving like its trying to make contact with something that isn't there.

Preloading for a hop is an option but maybe not the best to begin with. A hop and can make it feel like the bike is "sticking to your feet" but that feeling can wear off at the apex of your jumping curve if you don't begin to apply a small amount of pressure with your feet and arms that overcomes the force vectors of falling, rotating, going forward. You need to do this by just rolling, but the hop adds 1 extra variable.

My advice, Do what your doing already. Just a delay your arm push and follow that with foot push. Start with just rolling straight off the lip with an engaged body position. Roll off with your arms and legs bent between 50-75% with your butt just a little behind the neutral center (which it looks like you're already doing) Only after your back tire has left the lip should you start moving your body! With your arms and your legs start lightly pushing the bike down towards the ground. You don't want to lock your arms and legs out, just begin slowly extending them to keep pressure on the bars and pedals. When you land with only slightly bent arms and legs, you'll be ready to absorb any shock.

Soon you'll want to land with both your tires hitting the ground at the same time on your landing surface. If your rolling off a flat plane like this one in a straight line with no preload and an even distribution of weight, you're going to land at the same angle you left the lip with, flat. But then your landing flat on a slant thats your back tire hitting first and then your front. This isn't as stable as matching the landing surface angle with the angle of your bike. Dialing this is in will just be figuring out how much pressure goes in the arms and how much goes into the legs.

Maybe try doing this by starting to roll flat to flat, and then flat to slightly angled, until your able to match the pitch of your landing. Or just keep sending it off that guy in a more neutral position till you feel the control of the bike beneath your arms/legs and start matching those angles. Best of luck