Users will find the error “Error loading media File could not be played” when trying to watch a video on a self-hosted video content website. The problem occurs mainly when trying to load a file in a format not compatible with JW Player. Most of the time, the error is activated when the JW Player has the task of loading a .wmv or .mov video that does not use the H264 video codec.
Although the problem is commonly found in the desktop and mobile versions of Chrome, the error is not unique in this browser: it is also known that the problem appears in Firefox and Safari. As a result, the problem is caused by an incorrect configuration of the built-in media player or is caused by certain cookies or browser add-ons (extension).