The Harry Potter movies could be found on various online video platforms with restricted viewing. For example, there are many free Harry Potter movies on Youtube. You can type "Harry Potter movies" in the search box to search. In addition, there were free Harry Potter movies on online video platforms such as Facebook and Amazon Prime Video. If you want to watch it on other platforms such as Vimeo or Google Play, you can try searching for the Harry Potter movies. It is important to note that some movies may not be available for free online viewing.