There must be sufficient contrast between the text and the background. In Your Electronic Presentation We ask that you don't use photos that take up too much memory for the computer's size. Also, you should refrain from showing photos on equipment that does not have good resolution, as they will look blurred. In Your Electronic Presentation Clip Art consists of already created graphics which have an astounding variety. For video, there is a price to be paid.
Most clip art is designed for print.
On video, they will often shimmer due to the fact that the lines are simply too fine to be displayed on video. Therefore, we do not recommend the use of clip art. Again, we ask that you don't use clip art that take up too much memory for the computer's size.