BrainPop is great for so many reasons. Whether it's a quick tutorial video for students, quizzes, games or lesson ideas. BrainPop has a lot of content that is beneficial for both teachers and students.
There is also BrainPop Educator that takes it even further. It includes lesson ideas with all the required resources to be successful. It has online training including webinars and professional development for teachers. As well, it has a section dedicated to games - teaching with games, educational research about teaching using games, student game design. It definitely allows for creativity while also hitting content.
One of the other things I like about it is that you can search by the standards you use (ie Ontario, CommonCore, etc.) , grade subject and grade. This helps teachers quickly find the content they need that will be relevant to their students.