If you provide the name of the guide, I can help you find the exact download link.
If you are following a specific technical tutorial (like a video editing or coding guide) that references "IMG_5716.MOV": Download IMG 5716 MOV mp4
Select the video and click the icon (the cloud with the downward arrow). If you provide the name of the guide,
Use Handbrake (free/open-source) or VLC Media Player . In VLC, go to Media > Convert/Save , add your file, and choose the Video - H.264 + MP3 (MP4) profile. go to Media > Convert/Save