To open files or to play videos, left click on the Title. To save,
use the right click.
On most computers, a video will
play automatically a few seconds after selecting it from the menu above
with a left click of the mouse. During playing it will buffer itself
in the background until fully downloaded. If not, an error message
may appear. In this case it may be necessary to download the video
using the right click, then to save it locally before playing it locally.