How to Autoplay Background Videos before in view

I’m doing a pair of videos that should play at the same time.

It’s working great in Desktop!, since I’m using a 2 column grid. In Mobile, though, I’m changing the grid to 1 column (2 rows), so that the picture has a nice size. Because of that, the first video gets in-view before the second, un-syncing the pair.

How can I make it so that the 2 videos start at the same time when having them in 1 column (2 rows)?

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