I've done a few posts here on how to do rudimentary videos. An example of that would be
"Recording audio and video on the cheap".
You can do the audio part with something as simple as a Tascam DR-05.
Another recent post,
"Easy video recording with an Android phone".
Your smartphone can be a great way to shoot video. I'm not a fan of the fisheye view that common "music cameras" have.