Had my belt break a few days ago and wanted to know why, I know there’s an oil leak too just haven’t had time to find it. Should the tensioner sound like this? Posted the video on youtube

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

 

That belt tensioner is definitely bad and needs to be replaced. the good news is that they're relatively cheap to buy and easy to change out. Save yourself some money and do it yourself.