Not really, our application is a web app, therefore no download issues, it simply runs over a URL. Of course the organiser will need to set up the content and landing page before, this is simple enough, and of course arrange for the sessions to be streamed! I have actually seen this done with a mobile phone on a tripod over facebook live and it was surprisingly ok!
One point of note, streaming will often have a lag, 5-10 seconds. Normally the user is none the wiser, with Glisser as a realtime content share, you just need to account for the time delay.
The participant will simply need to go the the unique URL pushed by the organiser, input their email (optional) and they are in.