Add video demo

[CodeMaxx]

Add a video of about 10 seconds in the Player in Action section. The screenshots don't make it very clear how the feel would be while actually using it.

[harjot-oberai]

10 second video would not have been enough, so i have added a 3:00 min video of the player.

[CodeMaxx]

I said 10 seconds just to keep the size of the repo small. 3 minutes is better if that is not a concern. 😄