Here's a generic Hopin orientation video – feel free to share this with your attendees, or recreate your own:
https://youtu.be/QRBVbUCNTTg
https://vimeo.com/458278547/afb3988153
And here is another one created by The Marketing Mind for Jewellery Industry Virtual Fair
https://youtu.be/hN3dBcWPVPE