If you’re a musician, you should be releasing your new (and older) music on your YouTube channel. We work with several of our channels to help them figure out the best way to use their older music to keep fans interested while they're working on their next big project. We can also help you use your channel's older and more popular videos to bring more promotion to anything you're working on over the next few months.
Here's one service that will allow you to upload just an mp3 file and a picture, and they will automatically create a video and upload it to your channel:
Another one you can try is MP32U, which can also automatically upload the video to your channel or just let you download it if you don't want to provide MP32U with access to your channel. If you're sitting on any music that you haven't released on YouTube yet, think about using one of these services or something similar to create a ton of extra video content. And give us a shout if you'd like to talk about the best way to use your channel to promote your music (and vice-versa).