Weird noise coming from engine 2015 corolla L

Hey I have a 2015 corolla L, 80k miles, I do the oil changes, basic stuff, and recently I started getting this sound from the engine on idle and sometimes when I press the gas. Weird, anyone know what this is? I got a Toyota for reliability I don’t have much $ for expensive repairs. It doesn’t do it all the time but it’s getting worse. Mostly highway miles, my job is 37 miles away. Any thoughts? Belt? Will this be expensive?
Hard to diagnose with just with a sound clip. To me it sounds like either the serpentine belt or the drive belt tensioner. Inspect the belt for cracks first. It the cheaper of the two.