Weblectures or videolectures are on the video recorded lectures given in the classroom or lectures recorded in a studio. Videolectures are meant for education an can be used for different goals in the learning process.
Videolectures can be enriched by teaching material or assignments. The simplest way of enricment of the video is when a lecturer and the material which he or she is using during the lecture are presented in two different frames.
Short videolectures with a specific learning outcome are called knowledge clips.
Links:
In Dutch: http://www.weblectures.nl/