If video doesn't play smoothly then
click to pause and wait a bit for video to load,
or click 'smaller video' button if available


If you can't see the videos on this site
you may need a (free): updated flash player
Most of the videos use a flash player
with fallback to HTML5 for apple / iOS


There are a few Quicktime (H264) videos
for which you may need (free): Quicktime 7 or above


If you're using an older iPhone or iPad etc
and can't see the videos then
check for an 'iPhone iPad version' button at the top of page