Unfortunately, our certificate was a Cacert certificate, which means that it was not recognized by most browsers.
Then Mozilla started its fight against SSL with the most stupid UI ever (and was followed by Chrome) to force people into this SSL certificate extortion business.
Therefore, when, last week, our Cacert certificate expired, we bought a new SSL certificate from Gandi.net.
We have now quite a few service that now work on HTTPS:
PS: VLC and HTTPS
VLC 2.1.0 will play HTTPS in a better way, even with self-signed certificates of your seedboxes