The first time, of course, was in the Flashpoint event miniseries, wherein The Joker was in fact Bruce Wayne's mother Martha, who survived the assassination attempt against her but was driven mad by the loss of her son.
This time, it's in the popular Grayson: Year One live-action webseries that follows the adventures of Batman's first sidekick, Dick Grayson.
This episode picks up following the events of 2013's Grayson pilot, and actually follows not Dick but Jason Todd, who finds himseld kicked out of his mother's house and looking for meaning.
...Yeah, ignore the fact that The Joker is talking to Jason Todd and playing with a tire iron the whole time. That's nothing to concern yourselves with.