Apart from sharing your screen, you also have the option to share YouTube videos in a Session.
To enable this feature first of all find the event you want to edit within your organization dashboard in your Hopin account.
Then go the Event Dashboard > Venue > Sessions, create or edit a session and under Advanced Settings check the Enable YouTube sharing box.
Note: This feature needs to be turned on individually for each session.
While in the session, click on the Share Audio and Video Button.
Once you’re on screen, you’ll see a YouTube icon at the bottom of the screen, click it to share a video.
Note: If an organizer also has the Miro integration installed, the YouTube button will not display as an extra option, it will appear under the Share Screen button instead together with other options as shown below.
Then, copy and paste the entire YouTube video URL into the YouTube URL field and click on Share Video. 
The video will start sharing for all attendees in the Session.
Note:
- In a moderated session, only the Organizers & Moderators can use the YouTube sharing feature, while in an unmoderated session, anyone sharing their audio and video can share a YouTube video.
- It's recommended for the user sharing the YouTube video to wear headphones and/or mute themselves while the video is playing to avoid echoing.
- This feature only supports individual YouTube videos and YouTube Live streams. YouTube playlists are not supported at this time.
- YouTube videos shared during the session will not be included in the Session recording.