Here's a different video where the same side lifts up for both poles of a magnet. The corner that stays down is the same the whole time. https://www.bilibili.c

Here's a different video where the same side lifts up for both poles of a magnet. The corner that stays down is the same the whole time. https://www.bilibili.com/video/BV1Ex4y1X7ix https://www.bilibili.com/video/BV1Ex4y1X7ix