https://youtube.com/shorts/uPIqGoiylYA?feature=share

I’ve done a lot of reading on the forum and some people mention a buzz coming from the cam chest. It’s really only after the motor is warmed up. Also sounds like loud lifters but not sure if they are connected or independent problems. Most say it goes away when replacing the oil pressure check valve. I’m not convinced that is what it is. Wondering if someone can help me confirm or suggest what else I might be hearing. I’m not talking about the whining that is normal with all M8’s. I attached a YouTube link. Any help comments or suggestions are welcome and appreciated. Thanks.