How to add a cutscene (using an mp4 video)

I made a little cutscene for my game to play after the start button is hit. I am planning to have multiple throughout the game but I’m stuck on how to do it.

I tried the simple thing that seemed obvious;
Create a condition
‘At the beginning of the scene’
‘Play the video …’

But that hasn’t worked.
Am I doing this all wrong:)

Thanks in advance.

Videos and audios will play just when you interact to the game, try pressing a button in the loading screen in the preview.