Part of Video Blogging is creating screen casts which show a user how to do something on the computer itself. There is the wp:Screencast page that goes into more detail on the subject. This page dives into my own personal experieces and recipies for creating screencasts using Free Open Source Software.
OBS Studio
Several git repos for the project: https://github.com/orgs/obsproject/repositories?type=all
Record My Desktop
In 2008, I used the program "Record My Desktop" but since then another program has surpassed it in every way.