What are the patterns in these two matrices?

I found these puzzles on https://iqmentor.io, and could not figure out the solutions to them. Any thoughts?

I also posted this on Reddit. Including the link here in case you'd like to see more people's attempts: https://www.reddit.com/r/cognitiveTesting/comments/11b8tiq/iqmentorio_what_are_the_patterns_in_these_3/
(In the Reddit post there was a third puzzle, which someone already posted a satisfactory solution to, so I did not include it here.)

1. enter image description here This seems somewhat similar to another problem whose solution is described in this video, (and in this video with visuals).
My thoughts:

! Best I can come up with is that it's a topleft-botright diagonal sequence, with at most one of the corners moving sides across the horizontal bar, which would yield option 4 as the only answer, but that seems too weak of a pattern compared to the pattern of the puzzle in the video.
(Also, that pattern does not completely hold, because in cells 3-4-7, between 3-4 the white square moves to the top-left and is obscured by the black square, but then after the black square moves between 4-7, we should now see the white square in the top-left but we do not.)

2. enter image description here This seems like it should be similar to problem #35 in this video.

After putting the below together I realized I made an error, which I retroactively highlighted below, but including it anyway in case it inspires any ideas.

* This article was originally published here


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