I am looking for freeware, open source, or commercial software (under $20 one-time license) for Windows XP or Windows 7. I want to edit videos by hiding personal information on the video before I submit it to a support web site. I know software such as Adobe Premiere has a feature such as blur. In SnagIt, they have a similar feature called pixelate for still images. I am looking for something similar. Ideally, the video editing software should be able to track subsequent frames and blur that area of the video.
On SuperUser, there is an answer using FFMPEG to blur a portion of the screen for a set time. FFMPEG is open source.
YouTube now offers the ability to blur parts of the video and track movement of that object over time, so blurring is easily performed.
You could upload your video to YouTube privately, blur the video, then download the processed video using youtube-dl, then delete the video from YouTube.