Why is my Rheem blower making this squealing noise?

Hello, it’s a bit difficult to locate exactly where the issue is, at least for me, but it sounds like the blower is touching something periodically and that’s most likely because it lost its balance. I don’t know if Rheem uses the same balance mechanism, but in most blowers they add some tiny pieces of metal to rebalance the blower before assembling it, like car wheels, if somehow one of these pieces gets ejected then that can cause this problem.