YouTube is a video sharing website where users can upload and share videos. It was founded in 2005 and was later acquired by Google in 2006. While YouTube can be useful for educational purposes, there are also some disadvantages to using it in classroom settings. Some benefits include that videos can help teach concepts in a visual way and allow students to replay parts they don't understand. However, it can also be distracting to students and teachers, and there is inappropriate content that may not be suitable for children. Overall, opinions varied on whether YouTube is a good learning tool for students.