I've only done this using Firefox.
Go to
Firefox Add-ons and pick which one you want to use to strip the videos from websites. There are some that specialize in Google and YouTube and others do just about any embedded video.
I have one I use, but it's on my browser at work and I for the life of me can't remember what it is. I looked through about four pages on the add-on link I posted but didn't see it. I think you'll have good luck with some of those though and get what you want.