Want to improve video on my website

I currently have 20-30 football games on my web site for the coaches and players. The games files are in a flv format. Currently they are not able to be viewed on any Apple device, not sure why? The quality is so so...

I'm really kinda new to this all. We are in the country download speed are not very high 1.5-3 Mbps.


I would like to know how to improve quality and able to to display on all devices.


Looking for Ideas?


Thanks