They are very effective for large audiences and can add power and depth to any presentation. A minister can use a projector to present main points and scriptures on the screen while he talks. Videos now have the power of a theatrical release. They are outstanding for Bible Studies and Movie Nights. With the use of the Internet a local church could project the Tyler Services live, have an Area Coordinator conduct a live Bible Study or a minister could address several churches at the same time on the Sabbath.
Video projectors are costly but are worthwhile of a church project to save for one.
They can also be purchased used. In addition, as has often been done, sister churches can purchase one together and schedule its use on a rotating basis. To really appreciate the power of video projectors, you must have seen one used. I recommend that you consider the brightness of the projector as you make your selection. Brightness is measured in ANSI lumens.