Check the specification of your MP3 player to determine thetype of video file format it uses.
Most common video files that MP3 players use are, AVI andWMV, there may be others such as FLV, MOV and DivX.
If your player cannot play a video then it is anincompatible video file format, then you need to convert that video file to aformat that your MP3 player uses.
Click on this link for instructions on converting videofiles for MP3 players :-
MP3 players can only play music files in mp3 file format.You need to convert your CDs to mp3 music files onto your computer ordownload them from the Internet and then copy them to your MP3 player.
You can do this using Windows Media player and Rip the CDs - Media Player willcreate a MP3 music file for each music track.
Click on this link for instruction on converting music files to mp3 file format:- https://www.fixya.com/support/r5798418-creating_transferring_mp3_music_files