Here’s How to Send a Video in a Private Message – Adweek
Note: These screenshots were captured in the LinkedIn application on iOS.
Step 1: Tap the Messages icon in the top-right corner of the screen to go to your message inbox.
Step 2: Tap the message where you want to send a video.
Step 3: Tap the plus sign (“+”) to the left of “Write a message…”
Step 4: Tap “Video.”
Step 5: Tap the capture button at the bottom of the screen to begin recording your video.
Step 6: Tap the capture button again to stop recording.
Step 7: Tap the arrow button in the bottom-right corner of the screen to send your video.