The N.S.W's Curriculum and Learning Innovation Centre's Sites2See is an excellent place to visit when looking for online video resources.It is netbook friendly and has lots of Australian content for classroom use and professional development resources for teachers. There are the well known video sharing sites such as SchoolTube and TeacherTube as well as fantastic digital resources from the National Film and Sound Archive and Australian Screen's Education section.There are also video and learning resources featuring 40 authors and 27 scientists.The professional development resources can be found in the "For Teachers" section and it is here that you will find Edutopia (US) which has videos K-12 showcasing best practice in technology integration. TILT is also worth looking at for some examples of how teachers are using digital tools to create learning resources.
Teaching Channel
Another professional development site isTeaching Channel which has just been launched in the USA. Although American it will become a useful resource for Australian teachers as it is a video showcase of innovative and effective teaching practices. At this stage it is limited in that it only covers classes from Grade 3-8 but it is only in its infancy and will keep developing,eventually covering K-12 classes.If you access their website you will be able to subscribe to their video updates via email.