My 14-minute video was too big to send, so I shrank it

Recorded a 14-minute video to send and got stuck: the chat app said the file was too big, it blew past the email attachment limit, and uploading to a group failed halfway. Nothing wrong with the content — just too big, stuck at "can't send", which is maddening. I'm not a technical person, just how I fixed it. The video was a screen recording:...