I was trying to display a video on a level. The sound works fine but the video does not show. I tried several different video format

I’m a nooby using unreal and I followed this instruction to display the video. Play a Video File | Unreal Engine Documentation

Also, I referred to videos on YouTube that are the same.

My goal was to use the video so that when the player reaches the end of the game a short video pops up in another level explaining the ending and also the credits scene will appear.

The problem is when I drag the media sound wave and media texture to the static mesh, it only plays the sound but not with the video.

My game is in 2d mobile platform. (This is my first game)

P.S. is there a better way that I could show some kind of a credits scene or a slideshow that I could show pictures with music . Thanks