Determine the AC Emitter Resistance for an Amplifier

This 3 minute video illustrates the steps in calculating the AC emitter resistance for a Voltage Divider Bias (Emitter Bias) amplifier.

[@eggxecution]

if you have this same circuit and you remove the load resistance, is it still Common Emitter Amp?

[@eggxecution]

what if the bypass capacitor has a value, should I include it in ohm's law?

[@Dell-ol6hb]

So why do you use the DC emitter current shouldn't you be using an AC emitter current?