While modern versions offer behavior controls and 4K editing, v8.1.2 is lightweight and perfect for simple 720p tutorials without the subscription bloat.
Version 8.1.2.1327
"Just an FYI for those searching: is the last version of Camtasia 8. It fixes the audio desync issue from 8.1.1. However, do not try to install this on Windows 10/11—stick to Windows 7 or 8. If you need a key, TechSmith's license server for v8 is no longer active, so use a local key if you have one." Camtasia Studio 8.1.2.1327
Revisiting a Classic: Camtasia Studio 8.1.2.1327 While modern versions offer behavior controls and 4K