Try moving the computer from the table to the desk. You could also move the computer into your sim's inventory and click on it from there.

I also experienced the glitch that was shown in the video you posted. I noticed that it only happened when the computer was facing the wrong direction on the table. Turning the computer around or putting the computer back in the sim's inventory always resolved the issue for me.

The jumping happens when the computer is facing the wrong direction on the table. Turning the computer 180 degrees on the table fixes it.