How to stop buffering a YouTube video
Here's a semi-useful nugget from YouTube: You can easily stop a video from buffering by using the context menu. I'm not quite sure when this option actually comes in handy, but it's there if you need it. The blog post over at Google Operating System says that it's useful if the video is boring and you pause it. In that case, I'm not sure why you wouldn't just close the tab. I'm thinking this might come in handy when you're trying to free up some bandwidth quickly and you're buffering a longer video.
What's more interesting to me is the "Copy embed html" option that I just discovered (right under the "Stop download" option). That's actually handy for full-screen viewing -- or when my Greasemonkey script acts up and hides the Embed code box (which happens more often than it should).
Bottom line: Is YouTube getting feature bloat? Food for thought.