Every business develops a certain branding identity for themselves which becomes the face of their organisation. YouTube channels also follow the same strategy. They use their intro and outro music to introduce the logo along with the catchy score that acts as the identity of the channel. Everytime a video is played from a particular channel the same intro acts as a warming up for the upcoming while outro is an indication of a conclusion. 

 A presentation made using digital tools like Skype for Business or PowerPoint. It can also involve interactive elements that are embedded, like videos or animations. In Skype, live screen sharing and whiteboarding sessions may be used. To reinforce what you are saying with text, pictures, audio or video, use digital presentations. The mechanism of designing a digital presentation often allows you to think about your ideas