Since I started with Tiki 14.x I have had this issue of missing mime type handlers, the error still plagues us.
I am running Tiki 16.1 now and I am still experiencing this issue, I have a list of missing mime types as seen:
Currently I am trying to embed an mp4 video and cannot because of the missing handler perhaps?
Although I am able to view pdf, jpeg, and png.
Has there been any information regarding this missing handlers error?