I have been experiencing issues trying to join a live webinar (presented through gotowebinar.com, also known as gotomeeting.com - from LogMeIn Inc.). I use a Windows Server O/S.
On both occasions I have joined the webinar successfully but the video link session window has timed out. LogMeIn support have requested remote access to my PC to troubleshoot the issue and I have declined (I have a "trust nobody policy"), so no support has been offered.
This same problem also affects my Mac laptop (running High Sierra O/S).
On Opensesame, certain (pre-recorded) video courses start, but the video player window is empty and eventually times out. (an example of this is the course named: "Azure: Advanced Virtual Machine Deployment from Intellezy (duration - 1:15hrs). Other courses work as normal. (Support from OpenSesame suggested whitelisting the following domains in my firewall