looking for a tv short/segment i seen in japan long ago

i remember when i was a child watching the pythagoras switch videos on youtube, but i distinctly remember a similar program that aired 2018? called ‘black box’ in katakana or so, and the premise was similar, you have a line of objects like balls or something entering a black box and coming out were other things and you had to guess how the mechanism inside worked, and then they showed the inside.

i do not expect anyone to know this, but i cannot find it online as my japanese skill is amateur at best. i want to know if there are any more appropriate subreddits in which i would have better luck finding…

https://www.reddit.com/r/japan/comments/16u5b47/looking_for_a_tv_shortsegment_i_seen_in_japan/