Hi
Just tried on mine and seems ok, is it just this one or all of the videos? What it might be is that as the file is quite big, sometimes it is jerky and cuts out for quite long periods. The best way around this is to let it play all the way through - even if it jumps and then play it again from the beginning and watch it the second time, it should have downloaded the file then and play more smoothly.
You can tell if this is the problem or not, there should be a black vertical bar along the bottom, this shows where you are in the video, the thicker grey highlight line is how much has been downloaded to your computer. If the black line catches up with the grey highlight the video will stop until it can catch up. I know that seems complicated, but its just how these things work.
Do you think that is the problem? Or maybe something else? I can always put the video on youtube - some are already on.
Hope this helps
Rob