Most Tagtool sessions take place in low light environments, so it can be quite tricky to record good quality footage.
With DLP projectors, a strong flicker effect may show up in the recordings. This is very difficult to get rid of afterwards, so make sure you get it right during recording. LCD projectors are usually better suited for recording good quality image. More information about DLP and LCD projectors can be found in the Projector Guide.
To avoid the flicker effect, use a shutter frequency for the camera that is adequate for the projector.