While editing in youtube isn't the work flow most editors use constalty, it does have the ability to save time and effort on some minimal tasks. You can trim, cut and edit clips, but did you know you can also blur faces (and more recently) objects inside YouTube Video Editor?
This ability gives creators a way to quickly blur out logos, license plates, faces or property that you don't want seen in your final YouTube video. This is great for public/private shoots or when you are not able to get release forms from people inadvertently in your scene.
However, if you have overly sensitive material you are posting, you may want to think twice about using the built in blur tools in YouTube since it remains to be seen whether Google/YouTube could be compelled to reverse the blurring effects for government officials.