YouTube is clearly the place most people go to post their videos... at least for now.
Historically, it has been a multiple step process. However, Google has released an app called YouTube Capture to simplify the process. After you shoot your video, all you have to do is edit by trimming, stabilizing, color correcting or adding a music track, then send the video to your YouTube channel. That's it. Can you say Easy?
There are more sophisticated apps for editing and adding effects to your video, but if you want to get a decent video online quickly and easily, you can't get much simpler than this.