Develop a custom 4k video player

Which system do you use? Android, Ubuntu, OOWOW or others?

Linux Ubuntu Server

Which version of system do you use? Khadas official images, self built images, or others?

Self build Ubuntu 20.04 server Linux 5.4

Please describe your

Would like to develop a custom 4k video player,
I saw AML_player folder in source code, can I use that to do? How?