On YouTube, you can find a huge number of screencasts and video clips on a wide variety of topics – from cheese making to programming. YouTube has also given another important opportunity: to study the most successful techniques for creating videos and apply them at home.
Let's define a number of concepts of video clips.
Podcast is a term consisting of two parts – broadcasting (broadcasting) and the name of the mp3 player from Apple - iPod. A podcast is a separate file or a series of audio or video format files.
Screencast is a video recording of actions taking place on the screen; "screen capture" is used as a synonym. Screencasts are often used to demonstrate work in a particular program.
Chromakey is a technology for combining multiple images in one frame of a video. In fact, it is a green screen, which is removed during editing and another video sequence is superimposed instead.
Footage is a ready–made small video fragment containing animation or a video sequence. Often the footages contain a green or transparent background, which will allow you to embed your video frames into the finished video.