Configuring Multiple Source
At Configuring Multiple Sources page (https://support.jwplayer.com/customer/portal/articles/1710454-configuring-multiple-sources), It is the following example:
var playerInstance = jwplayer("myElement");
Here, the player will attempt to load an FLV file, which requires Flash. If Flash is not detected,
we'll head down the list and try our MP4 file in HTML5 mode. If our browser is still not capable
of playing an MP4 natively, we'll lastly attempt to play a WebM version.
Question: there is a way to be able to detect, via script, what is the active file used by JW Player?