Run into an interesting YouTube video on another site but don't have time to watch it right now? A new option lets you right-click mark it for later viewing and have it show up on YouTube when you next visit.
As Google Operating System points out, the option won't work on all embedded videos, and you'll need to be signed into YouTube for it to function, which isn't always the most secure choice away from your own computer. But if you want to save videos for later viewing, it's a speedy trick.
YouTube's Watch Later Feature [Google Operating System]