Game hangs after load screen on Samsung Tab E

[OllieBck]

I am able to play the Morse-Learn game on a Pixel C, but when trying on Samsung Galaxy Tab E the game hangs on a black screen after clicking "Tap to Start."

I am running Android Version 7.1.1 and ran the program on Chrome.

When looking at the developer console, I get

"Phaser.Loader - video[intro]: error loading asset from URL assets/videos/intro.mp4"

And then when trying to start the game: "phaser.js:107413 Uncaught TypeError: Cannot read property 'play' of null"

Not sure why the asset is not loading.