right click on itv catch up player
select plug-ins > options
new window should open
select performance tab
click on advanced box at bottom
under video acceleration you should see "use high quality mode" selected, if you click on the one above "use overlays" then you should see your program appear on the player.
finish by clicking ok and then apply on the first new window.
This worked for me after hours of frustration trying to view the monaco grand prix.
Please post a reply if this works for you so we can get an idea of how many people had this problem.