If you have a studio musician that is working on a music video, one of the most important things that you can do to ensure that the video matches the song or vice versa is to take the music and create an instrumental track that is the same tempo and has similar sounds. What this means is that it will sound very much like the song if you were standing right there in the room. If you have a video camera then it would be quite difficult to record the music separately without the instrumental track. That way the video will match the song with no problems at all.
The other most important thing to remember is that you should not simply play the music in front of the camera. You want to make sure that the audience sees the band and the performers and not just the lights and video. So always make sure that they see your band as well as the musicians. This is one way of ensuring that the entire band is in the video. Another method of doing this is to add a background track in the background so that it matches the music. The song is not going to match the video if the background is the same.
Another problem that many studios face is when the music video does not match the song or is too fast or slow for the song. In order to get around this you can edit the instrumental tracks so that it is faster or slower than the actual song. For example, if the song is very fast then you can slow it down or speed it up and vice versa. Of course, if the song is very slow then you need to get it a little bit faster in order to match the instrumental track.