I bought a MP4/3 player...need software help PLEASE!!!

Hi there. I just bought a mp3/4 player online. Can anyone help me get the firmwear (I think thats what its called) or help me figure out what i need to do?

I found some numbers and letters. LOL they are:

LG MP3 Player
K918VOK1
CM70038
ACT_V9.1.52.
Anyone please help me

meldiane17@gmail.com

how do i put videos on my mp4