Screencast
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
Terminal
To record a terminal session, you might want to use asciinema [as-kee-nuh-muh], a free and open source solution for recording terminal sessions and sharing them on the web. Read about how it works at https://asciinema.org