You can display videos in the chat using Chatbot+.
(1) Click on the setting button on the upper right of the management page.
(2) Click on [Chat]>[Function]>[Chatbot+] on the left side of the screen.
(3) Click on [Add parts].
(4) Enter [Part's name] and [Detail]. ※Leave the box at the top right [ID] empty, it will automatically be filled when Chatbot+ is created.
(5) Set rules.
(6) In the section [Action], click on [Send file] from the pull down.
(7) Enter URL of the video in the box [URL].
(8) Click on [Update].