You say there isn't much of a push in the video.
I don't know how well one can see how strong a push is.
For example, there are several videos on YouTube about the Aunkai pushout exercise, which you have undoubtedly seen before.
I've never studied Aunkai, so I'm not sure if the purpose of this exercise is actualy a push test, but assuming that is is to some extent, one could do this test with very little force or quite a lot of force. If you and you partner are balancing out, there are no visual cues to the amount of force being exerted.
The only way to know for sure is by measuring, not by watching a video.
My own body weight is 70 kgs (155 lbs).
When I push a bathroom scale horizontally against a wall, I have to push hard to get to 20 kgs (45 lbs), about 30% of my body weight. The height of my horizontal push is 120 cm (4 ft) from the ground. I'm 178 cm tall (5'11").
I recently asked my wife to push the bathroom scale against my belly, and gently increase the pressure. (Getting my wife to do it gently is a challenge in itself
I don't allow myself to cheat by leaning on my partner. My partner is allowed to suddenly and unexpectedly remove his/her force. If I lose my balance, I was cheating.
My limit was 9 kgs (20 lbs), 12% of my body weight. The height of the push was about 105 cm (3'6") from the ground.
I consider this a moderate push when I push the scale against the wall to the same amount. I might do a bit better if I practise more with my wife and the scale, but I think these number are a good indication of my current ability.
I gave you my numbers so you can go ahead and demonstrate that you can withstand a stronger push than me using nothing but athleticism. I have no doubt that you'll succeed.
I really don't think push tests should be like a weight lifting contest. I think it's for monitoring my own progress. Most important for me is that I'm a lot better now than when I started. (I haven't done such a test when I started so I have no numbers to support that, though.)
Anyway, I'm still very low level. Is it too far fetched that I could increase my limit to 20 kgs (45 lbs) by training a few years more?