Attempted Heating and Solder Application

What happens here

A torch, likely a propane or MAPP gas torch, is ignited and its flame is directed with intense focus towards the brass fitting and the adjacent base of the copper pipe. The flame is primarily concentrated on the joint area. Subsequently, a roll of solder wire is brought close to the heated region, indicating an attempt to melt the solder and allow it to flow into the joint, aiming to create a sealed connection. During this process, small red sparks become visible, which could be attributed to the torch's interaction with residual material, impurities, or flux on the pipe or fitting, or simply from the high temperatures involved.

Goal: Melt solder to create a secure pipe joint