I want to create a script that I can use on my google extension that is capable of interreacting with a websites' embedded media player, specifically a JW Player (8.24.0) iframe, and to be able to do functions such as pause, seek(x), read-time etc.

it's neither my site nor my video resource, so I don't believe I have any way of acquiring the jwplayer() object - would be happy to be proven wrong. otherwise I just want to know if there is any way in which I could programmatically interact with the media players' control bar and/or timeslider?