Well, I presume that you wanna shoot a simple music video of your own, I supposed so. This is how we does music video for people. And in fact, this is the way how music videos are made. But you would need some equipments and software to do it.
First, settle the audio. Playback the drums track and whatever necessary backing tracks in an audio recording software while you plug in your guitar via an audio interface into your computer to over-dub your guitar into the backing track. Mix-down and you are done.
Next, set up your video camera to whatever angle that you want but do not turn on the mic on the camera. Just shoot image without audio. Then, playback the backing tracks or the mix that you've done with whatever music player that you've got, while you strum along with it so that your footages captured in the camera is in sync with the music. Now, import the mix of the music that you've previously done, and footages from you video camera, into a video editing software. Sync image with mix and you're done.
In this way, you can turn on you music player as loud as you want without the fear that you video cam mic didn't capture a balanced the audio between your own guitar and the music player. Furthermore, with this method, you can even shoot different angle of you playing the guitar and simply edit and place them in sync with the music in a software.
