Timeline does not work when I play - Getting Started & Setup

Hello, As the title says, I have created a timeline that plays a video on a texture and makes a sphere move (it’s for a practice exercise). The “level sequence” works perfectly, I can slide through it and see the animations or press play to see how it plays. But when I play the game in “Selected Viewport” the timeline can’t seem to play on its own (I have to press play) and when I use “Standalone play” the texture stays blank and the sphere doesn’t move no matter what I do. I don’t know

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