Maybe? Can you stick your other devices into it, or is it completely useless for anything? If the former, then the extender, or any Roku non-stick model should work as well as any other thing you stick in there. (Or after confirming that one of the other device/cables works – maybe just leave it there – at least for now.)
BTW, you can also find right-angle HDMI plugs on places like Amazon – just be sure to get one that angles in the direction you need.