I don't know if it will work, but you can run a quick test with a rewritable disc
Simply, make a DVD video with the usual AUDIO_TS and VIDEO_TS folders, then add a third directory named any way you like (for example Music).
In this way, you should be able to read the disc in the DVD player, and the Music directory can be easily accessed by any computer drive
If the video is not in VOB format but is instead an avi, then it is not necessary to do anything special. Simply make a data disc containing all files in separate folders (a folder for video and a folder for music). This is sufficient providing that the standalone is able to read avi files