If you give the player and the box physics behaviour then you should be able to push it around like in the video
Yes, I know how to make a chiak so that the player pushes the box, but I can't get the identical behavior of the box as in the video. For example, the player jumps, touches the top of the box with his feet and the box rolls, or the player pushes the box and at that moment the part of the box that is near the player jumps up a little (I use Google translator)