This is the most interesting mash up I found. It has a youtube video for every single location pin-pointed on that map. You can see people hanging out from every corner of the earth. Some of the places I checked out were Australia, Japan, China, Greenland, Egypt, New Zealand, and Brazil. Some of the videos aren't very long, but it's still really cool to see a view of that location for every single marker. There's so many spots to choose from, too. This must have taken forever to put together.
Maybe one day, using the same type of idea, someone will be able to set up a network of cameras stationed all over the world for you to get a live feed of what is actually happening. Of course, these could exist already, but if they do, they're not available to the public. These maps are also somewhat educational because it let's you get an idea of the type of geography and atmosphere of these various areas around the world. It's better to see a live video of these places than just see a picture like you normally would in a school textbook. I'm unsure if this is the completed version or an ongoing project, as not every single location is entirely available to view through this map.