I don't often use it, but last night I attempted to watch Sunken Warships, on My5. I don't know if it was my TV, or a server issue, but (and I have had the issue before)....
It would show one part, then the ads, then reshow that first part. I had to use the back button, then continue watching, at each ad break, to get it to play the next part - all the way through. Making things even more complex, the remote would seem to lock up completely, in My5, with the only way to recover, to switch the TV off, and back on. There was nothing amiss with the remote itself.