droning sound when driving at 40mph+, uploaded video, can anyone help identify..?

hi all, OK I have a 2012 Prius three with 260 K miles on it… Recently I’ve noticed at any time that I’m driving faster than around 40 mph. I start to hear a groaning sound, I cannot identify where it’s coming from… When I roll my window down, it’s actually quieter. Went on the highway going a good 60 to 65 mph. I took the car out of drive and put it into neutral, the sound was not affected, stayed at the same drowning pitch, so I’m assuming it isn’t necessarily drivetrain related?

I took a small video, hoping to capture the sound itself, so perhaps others could listen, and maybe identify… It’s only about a minute and a half long, to be found at:

https://youtube.com/shorts/OBOhRcTeSjw?si=FNjk_RL1FHIbNqZd

if any could take the time to listen, I’d really appreciate some input, this is a sound I’ve never heard before, and for the moment I’m limiting driving to 40 and under, thanks in advance all.

 

thx for your reply, we’re you able to hear the sound on my video clip?