kinetiksoft reported that since the 3.2.0.beta3 update, video preview images are not displaying in Discourse, instead showing a black screen. This issue seems to be a breaking change, as videos uploaded prior to the update still show previews correctly. An example of the issue can be seen in the official 3.2.0.beta3 announcement.
What’s interesting is that seems to be a breaking change, as all the videos uploaded prior to that show the previews correctly in our instance. Let’s just check some of previous posts at Discourse Meta prior to 3.2.0, where you can see video previews showing up correctly:
