The YouTube team released an example mashup that merges Gears geolocation and the video geo search. Using the demo application, you can find nearby videos based on your location, maybe even your neighbor's Firefly tribute movie.
The technology grabbing the videos is YouTube's new geotag searchable API. With a latitude/longitude pair and a keyword, the service spits back a list of videos.
So, where do those coordinates come from? YouTube's example uses Google Gears' new geolocation feature. There are a few different implementations, and a developing standard for accessing location. My JavaScript geolocation tutorial covers the bases, including the similar Geode plugin baked into the next version of Firefox.
The best part about the example application is that the source code is available. I wish everyone did this. It sure makes picking up new technologies easier.
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