it could be that your brakes are dirty or that you need new pads
A worn belt will cause a squealing noise. The squealing noise is caused when the belt slips. Tightening the belt will temporarily fix the problem.
When a car makes a squealing noise during turns it means that your roters are worn out and you need new ones, bad breaks can cause wear on roters due to more friction heat being pruduced because of the lack of break pad material so you probably need to get new breaks as well.
The most common cause is slipping belt
It is the starters breaks after it finishes starting the car. It is normal and it is ok.
Check the belts. The most common cause of squealing is a worn or loose belt on the front of the engine.
Loose or worn belt(s).
check a/c compressor and belt.
That is the sound of metal on metal. I suggest you immediately take your car to a mechanic and have the brake pads replaced before you cause too much damage to the discs.
When refilling the oil some may have dripped onto the belt which would cause it to start slipping badly and squealing loudly.
Yes.Equally likely is if the belt is much more than 3-4 years, the material is glazing over or hardening, which is another common cause of squealing.
It sounds like the fan-belt is slipping.
It sounds like you need a new serpentine fan belt.