Hi I've got an old freelander 2 it's been about a bit with 184k miles on the clock, recently serviced but has developed a noise that goes in tandem with the engine revving. The strange part is I can hear it from inside the car coming from the front but can't hear it when I'm outside the car or looking into the engine bay. I've uploaded a video, it sounds louder in the video than it actually is in real life. Sometimes it goes away sometimes its louder. The performance doesn't seem affected by it at all. I'm going to try take it to a garage tomorow anyway it's just annoyingly developed before a weekend so I feel like I won't get it in anywhere, so just thought I'd ask on here see if anyone can give me a clue.
Thanks

https://youtube.com/shorts/9D89Fh-ex8U?si=KkSfL3lOytuArSIX

With mine it was the propshaft bearings. At around fifty to sixty with foot on the accelerator the noise appeared foot off and the noise stopped. I had it running on a ramp to confirm