Quick, the boss is coming! Or, crap the baby is awake! For times when a YouTube viewing session gets interrupted, Pause For Later is a handy Chrome extension that will save your spot, letting you close your YouTube window or tab and pick up later at the exact spot where you left off. It saves the video and your spot to the Pause For Later Website, where you can go and resume your viewing when your schedule allows.
When you install Pause For Later, it adds a pause button to Chrome's toolbar. When you are viewing a YouTube clip and need to pause the video, instead of hitting pause on the YouTube player itself, click the pause button Pause For Later installed in the Chrome toolbar. You will then be taken to your list of paused videos on the the Pause For Later Website. (For your initial pause, you'll need to sign up for a free account.)
For each video on your Pause For Later list, there is an Action button where you can resume watching (Watch Now) or watch from the beginning. Among the choices is also a convenient Copy Short Link option, making it easy to share the video.
I tried it out with YouTube, Hulu, and Vimeo videos and found that it held my spot only for YouTube videos. Hulu and Vimeo clips get added to the list, but they neither pull in a thumbnail nor remember the spot where you paused the video.
Pause For Later is a useful extension for frequently interrupted YouTube viewers, but it would be much more helpful if it fully supported more video sources.