1. Open the video you want to play. If the video is on a website (e.g., YouTube), go to the site in your browser. If the video is saved to your device open it with a media play like Vlc or media player classic.
  2.  When you are ready to play the video, click the Share Screen button on your Zoom control panel. The "Share Screen" button appears in the Zoom control panel between "Polls" and "Chat."
  3.  Select the video from the menu of options in the "Select a window or an application that you want to share" box. An example of how to share a locally saved video in Zoom 
  4.  Enable the "Share computer sound" and "Optimize Screen Sharing for Video Clip" setting. Then, click Share.  The "Share computer sound" and "Optimize Screen Sharing for Video Clip" settings, and the "Share" button, appear at the bottom of the "Select a window or an application that you want to share" box.
  5.  Play the video and when the video ends, click the Stop Share button. 
     The "Stop Share" button in Zoom appears in the control panel for your Zoom room.

NB: if playing a video from your pc, make sure that its an Mp4 format and video quality is not greater than 480P