Video
Essential Software
VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols.
Open Broadcaster Software (OBS) is a free and open-source cross-platform streaming and recording program built with Qt and maintained by the OBS Project. There are versions for Windows, macOS and Linux distributions, such as Ubuntu.
Camtasia (formerly Camtasia Studio) is a software suite for video editing and recording. The benefit of this product over others is that it is very intuitive to use. Price as of May 2019 was $340 CDN (2 seat licence).
