well I did nothing as I should have lol, except the one with the blue square hehe.

I have no idea how I was supposed to figure this out.

in the cross at the buttom,i started by taking out the middle box and the one to its left, then the one above so the red falls. then, i took out the corner blue right under the red that is the third from the topright corner, let it fall, and then the other one under it. then I released the green near the two reds, let it fall, then the blue right in its way. then i released the red near the three greens, and then the two reds that are together from before - they would also take out the buttom red with them. then i'll release the red you released first, and the one near it, somehow to get it inbetween the two blue-green structures on the left. the gravitated blue did its work now, and then i let the topmost green down, so that the topright two reds can be released easily one by one. the buttom red there would be taken out too. we only have three reds left, but they are problematic. i could get the topmost and leftmost one off, but the one in the middle, i always had problems with it. so yeah, you cheated

That's too much to comprehend, but I can tell you didn't do it the way in the video, so try that D:
I didn't cheat.

just try to follow my post up there and see how I did it. do it slowly, especially the up-right parts. i'm trying to show you how i was thinking; since in this kind of levels there's probably more than one solution, and the likeliness that people will have the same solution is very tiny, showing a different solution idea could be worth the while, I think...