At what point does the video stop? I have done a basic check of the start, middle and end of all 27 presentations, and just did a more detailed check on Mario’s presentation and it looked OK, but I did not rewatch all of it.
Is there a chance you were not logged in, or that your browser did not recognise that you were logged in? If you are not logged in then you can watch the first 2 minutes and then the video stops.
Mario’s email address is at the end of the presentation, so once you can view it then you will have his contact details. If you still have trouble, then it may be worth contacting by email to trouble shoot. We would need to check browser and operating system as it could be some kind of compatibility issue. The videos may not play on older browser and operating systems, though downloading them should get around this problem.
I see you posted your dark skies plea twice. I would usually recommend posting the same message to just a single forum. Otherwise you will need to look at 2 posts to get the whole message and it will knock another post off the top 4 shown on the homepage.