Heat Joint and Apply Solder

What happens here

Using a MAPP gas torch, begin to heat the copper pipe joint. The narrator highlights MAPP gas's hotter burn compared to propane for quicker soldering. Observe the flux as it heats; it will start to drip, indicating that the joint is reaching the appropriate temperature. If you notice too much flux dripping, you can carefully wipe off the excess during this heating phase. Continue heating the pipe, not the solder directly, until the pipe itself is hot enough to melt the solder when touched. The molten solder should then be drawn into the joint by capillary action. Continue applying solder until a complete bead forms around the connection, and the narrator suggests looking for a 'green flame on the other side' as an indication that the entire joint is adequately heated.

Goal: Create a strong, sealed solder joint by melting solder into the heated connection.