I'm not sure that this is the best place for this post, but on the other hand I could not think of a better forum. Of course I understand if this post must be downvoted since it doesn't strictly pertain to MathOverflow.
In the past few months, since Covid-19 has turned our world upside down, nearly all mathematical seminars have gone online; a huge number of them can be found on researchseminars.org. Moreover, nearly all of these seminars now take place via the videoconferencing program Zoom.
It has come to my attention that Zoom does not work with IP addresses in Iran. If you check their website
you will note that several countries are restricted, such as Cuba and Iran.
These sorts of restrictions are, of course, huge obstacles in the way of the free flow of ideas and the cohesiveness of the mathematical community; and no matter your opinions on this particular matter, I think that most would agree that the decision of whom we share our research and work with should not be made by a company, particularly a company beholden to the political situation of its parent country.
I don't have a particular solution in mind besides "find a platform which doesn't restrict access and service in this fashion", but I think it's probably an important time to start a discussion about how we, as a mathematical community, are going to run our seminars and disseminate our work, especially as things move more and more fully online.
Please let me know if there are any corrections I should make, if this is the wrong forum (and you have a better forum in mind) or with any other comments.