Using the action actually taken in the next state for the Q-learning update gives SARSA.

“Cue uh a cue from a next state of for a specific action and then uh you say this has to be the same as doing a cue function from the original state already. This then gives you two options, right, the first option is we could choose kind of for the next action to choose here, right, because the cue function has both a state and an action at at this note, uh at this future note. You could choose well, we pick the action that was actually taken in the real world.”

“This gives you SARSA.”