I have always loved things that fool the eye. Here are some wonderful examples.
The Black Dot
These images are not videos, yet they appear to be rotating cylinders.
Try this one!!
They are actually straigh, parallel lines, but they sure don't look like it, do they?
The Spinning Lady
Check which way she is rotating and then watch carefully for a few moments: she'll reverse and spin the other
way!! Can you control it?