when I said “everything” I hoped you’d present everything. oh well.
I’m betting something rotates these pictures but it’s not OpenCV.
use imread to read these pictures, check the .shape of the returned array.
actually, also do that to the frames you read from the video, as you read them.
you are dealing with colab and google drive and possibly accessing this from android or who knows what operating system. all of these could be lying to you.