Hi,
I googled it quickly and there seems quite much js options doing this..
So, i would guess: possible.
Might have a try one of these days..
Tuur 
Looking at this myself and yes there are a host of ways of doing it some low cost or free if you are willing to code all the client and server code required yourself.
As I understand things WebRTC (opensource) will handle the streaming component (your screenshare, video and audio) and a realtime messaging server will need to handle the rest.
Not sure how 3DVista are doing it, but I think eyespy 360 from a glance may be using webRTC and Ably. Ably is not free.
Some solutions with a nice API wrapped around all the heavy lifting can be found but can be very expensive - as in thousands of $ per month depending on usage.
Looked at literally dozens of solutions so far - brain fried!!
GeoK
That would be a cool feature to offer, but i don't think it is easy to implement that yourself.
i googled a bit but I couldn't find a base framework.
lots of questions on how this even works...
Definitely worth looking at Ably (they have a free usage tarif) and one of the WebRTC libraries as a proof of concept.
Platforms like Zoom (they also have an API) could be used - why reinvent the wheel? - but it would be nice to have functionality built into your tours.
You could do something pretty nice fairly quickly with Vonage but the pricing is.....well.....see attachment.
Hi,
I have developed a plugin for this purpose
I will publish it in the next weeks as soon as I write the documentation
please be patient.
That would be a cool feature to offer, but i don't think it is easy to implement that yourself.
Yeah, there no way I have the knowledge or skill to implement this myself. But I will be wanting to get some quotes for work I have coming up, which I will post here in a couple of weeks, and having this function would be the icing on the cake.
Hi,
I have developed a plugin for this purpose
I will publish it in the next weeks as soon as I write the documentation
please be patient.
WOW. I'm excited to see what you have done. I will try to be patient :)
Hi,
I have developed a plugin for this purpose
I will publish it in the next weeks as soon as I write the documentation
please be patient.
Hi,
Can I ask whether this is video call 1:1 or 1:many - with screen share?
Thanks
it is many to many video/audio calls and text chat.
yes. somehow it supports screen-sharing.
and a few more cool and practical features 
Can't wait to hear more.
Hi,
I have developed a plugin for this purpose
I will publish it in the next weeks as soon as I write the documentation
please be patient.
look forward to! thank!
sounds very interesting!
+1
it is many to many video/audio calls and text chat.
yes. somehow it supports screen-sharing.
and a few more cool and practical features
Sounds good and presume it works OK on windows, android and ios? Any ideas on timings?
Definitely interested. I presume this plugin will require some kind of php / sql database being setup to store the commands which the receiving krpano can retrieve? Happy to be a beta tester if you need one 
So exited to hear more about it! It's a very good idea!
Very interested too!
Live Presenter Plugin (COMING SOON)
a new plugin for Krpano & Panotour Pro
https://www.youtube.com/watch?v=MKCbxfVmOoI
Ohhh nice!
Looks very good!
any price indication?
Tuur
TAKE MY MONEY 
This looks incredible. I'm very excited about this indeed.
YES SIR...
Looks very promising...
Any release hints?
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