I didn't notice anyone else creating a topic for this, so it may be an issue on my end. In order for me to open a video for a given game entry, I have to click within the upper third or the lower third of the video's thumbnail. That is, I can't click anywhere on a thumbnail that is meant to start a Youtube video - only the lower third of that thumbnail is selectable. There's no issue with screenshot thumbnails, however.
I think the issue, if it's on the website's side, is to do with the icon that appears atop every video thumbnail - the triangular "play" icon. There's probably a way to make the icon cursor-transparent (if you will) such that the browser will ignore it. Or it could be given the same link HREF as the underlying image.
Firefox 31 and Arora 0.11.0