Of course this is not a perfect test. Depends on your headphones or speakers/room.
Play the video and stop it when you can no longer hear anything. I got up to just 14k on both my akg headset and my speakers,
You can also tell the frequency response of your room. If you listen in headphones you might hear some volume changes in left/right or both ears. That's probably your actual ears repsonse.
Then listen through speakers. You might hear low and low mids changing volume quite a lot. That's your room or sitting position. I like to take note of this so I know what my room is doing.
My room has a little dropoff around 290 Hz but otherwise is pretty flat. I can hear some shifts in volume from left to right in higher frequencies - and that's the room .
I was mixing the other night and noticed one speakers was slightly louder. Well... that was me. My ears are still a little fucked up from the cold.