Using ffmpeg to trim video

No real tutorial here, just a link to a great resource on this via Stack Overflow:
Cutting the videos based on start and end time using ffmpeg

Cutting with ffmpeg takes a lot less longer than rendering out via iMovie, and it results in a similarly sized output file instead of a giant one

P.S. My boss just showed me how you can do this in Quicktime with Edit > Trim. Much easier!