Why we require screen recordings?
A screen recording demonstrates bugs and makes it easy for other testers, test leads, QA managers, and clients to see. Furthermore, it can be used to evaluate if it is really a bug or not. Videos provide more detail and include the steps to reproduce as opposed to screenshots.
How to record your screen?
Things to keep in mind:
In Testlio, a video screen recording attachment has to be less than 10 MB and in .mp4 format and with a minimum resolution of 720p. so you will need to convert QuickTime files and compress them before you attach them to your bug report.