YouTube and TeacherTube can provide rich resources for so many curriculum areas and interest areas. School networks can be problematic when linking to video - it often freezes. Respecting copyright also becomes an issue. We now have Clickview and with 24/7 are able to add video content which students are able to access through compressed files - much healthier for our network. Also, it is and easy matter for students to embed short segments of video into presentations.
Although online video is a really poular format for students, they do encounter problems of seamless access.