Video transcoding or conversion is very common, to be able to do it, you can count on Handbrake for Linux
Compress Videos without Losing Quality (Free for Mac or PC)
Compressing Your Videos Using Handbrake – Athens State University Knowledge Base
HandBrake - An Open Source Video Transcoder
HandBrake: Open Source Video Transcoder
HandBrake: Open Source Video Transcoder
Handbrake: A Very Capable Video Converter – Fossery
Latest New Release Handbrake Video Converter for Windows on DVD
HandBrake — An Open-Source Video Transcoder, by Lupin Curt
Handbrake Open Source Video Transcoder
What Is HandBrake and How to Use It for Transcoding Video
Handbrake: A Very Capable Video Converter – Fossery
HandBrake 1.0 released after 13 years (open source video transcoder) - Liliputing
How to Install Handbrake (open-source video transcoder) on Ubuntu 20.04 Linux