The video will be a proof If you get hit or killed (I hope not!). Depending on where you are located, cops may actually give tickets to people breaking the law, and caught on your camera.
I know that in UK, you can tag licence plate on YouTube videos, which are easily searchable by their cops. It's something normal there to contact cops with the video footage to spank the bad driver.
Just be beware, that uploading videos like that to YouTube, will make all cyclist haters find you, hate you, and they will be calling you all kinds of names lol
To the majority of population, videos like that are not considered a safety aid/personal protection and so on...They think we only post them to make them angry and to make money