To watch a YouTube video that was shared in a group chat:
1. Tap Share screen in call on the YouTube video preview message shared in the chat.
2. Select Voice call or Video call to start a call and watch the video with chat members.
Note: If you played a YouTube video in a chat, tap the screen share icon to share it.
If you have URL previews turned OFF, the Share screen in call option will not appear. For information about setting URL previews, see this Help article.
Note: The Share screen in call button at the bottom of YouTube video preview messages is only processed and created on your device, and not on LINE's servers.