How can I send a video message in a conversation on my mobile device?

On mobile

In the conversation list:

1. Select the name of the conversation where you'd like to share a video.
2. Select the shutter button .
3. Select then camera switch button  to change from front to back camera.
4. Record a video.
5. On iOS: Select the play button to preview the video, Retake to take another video, or Use Video to share the video in the conversation.
   On Android: After recording, preview and confirm your video or retake the video.
6. Select the check button  to share the video in the conversation.