Video file not playing on mobile OpenSea testnet

I am doing some test mints of a 4096x4096 48mb 8second video file. It plays fine on OpenSea with my laptop and 2 desktop computers but on mobile the video doesn’t load/play, it just shows the thumbnail.

If I scale down the resolution to 2160x2160 it plays on mobile.

Is this simply because the resolution is too large for mobile?