A number of amateur astronomers have found that they could do interesting astronomy using their video equipment coupled to their telescope or other astronomical arsenal. Using camcorders or cheap surveillance CCD cameras, it has become possible for the humble stargazer to record on video what is up there and watch it on their TV for the whole family to enjoy when it's raining. This is a good approach if you already have a camcorder available and is the more plug and play approach.
Many camcorders have their lens fixed and the camcorder needs to be coupled to the telescope.
For camcorders which have a removable lens simply use a T thread such that it is coupled to the telescope in a similar fashion as 35mm Single Lens Reflex cameras typically used for astrophotography. Use a cheap surveillance CCD camera . This is a much cheaper approach but requires some homebrewing. Some electronic stores sell bare CCD cameras with the supporting electronics on a single board ready for you to install in a box. All you need to do is make wire connections for the power and TV output and attach an adapter to the box for the focuser.