As pointed out around 8:19, if you don't have a 4 terminal resistor, use a Kelvin style connection where the voltage sense wires do not carry load current. Any resistor you model in LTspice can have a Kelvin connection but since wires don't have resistance in LTspice, I don't know that it matters. You could, I suppose, model the wire resistance and then it would matter how you made the Kelvin connection.
Kelvin connections have been common on bench DMMs forever.
In any case, simulation isn't hardware. Even if LTspice tells you the circuit is perfect, until it is actually running, it isn't real.