You can watch the movie "Home Alone" streaming on Disney Plus and fuboTV. It is also available for purchase or rental on Amazon Video, Apple TV, Fandango At Home, and Prime Video. Additionally, all six movies in the "Home Alone" franchise are available to stream on Disney+ throughout the year. There are no free streaming options currently available, but watching on Disney Plus or renting/downloading from the aforementioned platforms are the main options to view the movie legally.