Sequence Stratigraphy Movies
The best way to view the YouTube movie frames is to first click the pause symbol on the control bar and then use the mouse to grab the thumb (red circle) on the red seekbar (this tracks the progress of the movie) and move the thumb back and forth to chosen frames and so gain a better understanding of the evolving sedimentary geometries.
In contrast the best way to view the Quicktime movies and control their motion is to use the arrow keys on your keyboard.
For RealPlayer click (download).