And on this landing...
While you were going upright, you were pulling a bit on each downtube which created a bit of mild PIO while on final. You can see your glider rolling side to side a bit. The problem was, the energy that you had put into the glider that had created this mild PIO had not yet dissipated by the time you went to flare. Ie, there was still a bit of turn energy left in the glider. A slight turn/roll to the right.
So, when you went to flare, the right tip dropped first and touched the ground. And that can tend to push the nose down once the tip touches. So, going upright sooner, getting all squared away, then being as still as possible will allow all of that pilot turn input energy to dissipate away which will mean that the glider will flare evenly.
Finally, I agree with what the other pilots have pointed out. Don't push out/forward. Push up past your ears and hold your arms straight up until the glider has completely stopped all movement.
Just keep at it. You'll eventually figure it out!