From the video, it looks like you could get a better angle going, so you can throw more weight forward when you gap.
Flatter tyres, it doesn't look like you're getting much bounce out of your tyres, if you have them a bit flatter then your tyres will bounce off the edge rather than roll off the edge of your take off, it also benefits your landing too as it's much easier to land as more tyre is in contact with the pallet.
You don't seem to take a pause, much like a good sidehop I prefer to find my balance point on the edge of a gap then pre-load down with all of my effort and go for it, okay it's everyone's personal tastes, but if you watch videos of Damon you will see that he is the god of this technique.
Think about body weight transfer, this is the key to trials. My bike weighs 9kg, I weigh around 74kg. So out of the two it is body weight transfer that will bring to bike to wherever I want it to go. This isn't just with gapping, think about sidehopping and everyone else, it is just body weight transfer.
Best tip I was ever taught was to think about your hips, look at a video of Damon or anyone else who can really exert power on a bike and look at how much their throw their hips in any aspect of their riding.
Whilst all of this does sound very simple and easy to add to your riding, it still does take a lot of work and commitment, but if you think about it all before you gap, it WILL work.