George,

IMO, use of video is open to interpretation. Whether or not its a good idea is subject to what you hope to accomplish. If your goal is to make the lyrics more accessible to the listener, then its the perfect marriage of audio and video.

On the other hand, if you want to evoke visual images to intensify the music's effect, then adding pictures is a good approach. Some songs do both.

Bottom line, I liked it... it turned out quite well. I think your voice is particularly suited to the style of music in that song. Nice job!