Hi all, I am doing this online course and all lectures are online videos using Wistia platform. I have recently installed Linux Mint 20.2 and latest version of Firefox but the videos don't work. Page loads fine except the video where only a large grey box shows with no controls. This was also an issue when I was using Linux Mint 18.xx but at least it worked in Opera which I was also using at that time. Now it doesn't work in either Firefox or Opera. is this perhaps an HTML5 issue? Don't think Wistia are able to offer any support and neither is my course provider. Their response was 'this is weird, works fine on our computers'. thanks in advance for any assistance

found a solution to this. While I thought I disabled all extensions in order to eliminate all possible culprits, I missed one. Forgot to disable Ghostery which was casuing the problem all along.