Here's a couple of Nexus 5 related videos I thought were well done.
Nexus 5 vs. iPhone 5s Camera Test - a great side-by-side comparison of the two cameras
Nexus 5: Black vs. White - a good look at the small cosmetic differences (aside from colour) between the black and white versions of the phone
1080p Video Sample - a two minute video showing what 1080p from the Nexus 5 looks like (includes a bit of zooming as well)