What does "all the way" mean? What kind of nuance is that?
The expression "all the way" means totally or completely. So in the video here, "five stars all the way" expresses that he is definitely or totally going to give them a five-star rating on the app. This expression is very informal and generally just used to emphasize excitement or express that something is the best. Ex: "I like Coca cola." "No, Pepsi all the way!" Ex: I'm from Los Angeles. Lakers all the way!