Youtube
Video sites such as Youtube can be an excellent resource to use within the classroom. I have used video myself within my GPP practice to set the scene when starting a new Literacy topic based on the Bog Baby, I had various props set around the classroom and had the youtube video below for the visual effect of a boggy woodland and also the audio track that is with it. It formed a great opener for the topic and created alot of discussion about what the children could see and hear.
As stated I believe that video especially Youtube can be an excellent rescource for teachers, however it does have to be used with caution. Many online videos have adverts that play before the main clip, some of the content of these can be unsuitable for young children, additionally many vidoes can have adds that come om while the video is playing promoting things such as online gambling sites. For this reason there are some schools which do not allow youtube to be used within the classroom.