How to perform convincingly (presentation in front of the camera, microphone, in front of people)

How to keep the audience's attention? How to present yourself, organization, product ...? Do you want to capture, clearly explain what you are doing, to convince the audience about your ideas? You are afraid of stage fright, many unknown people, topics, unexpected questions, time stress, cameras, changes in the meaning of what you say, reactions in the performance?

More info: https://www.pdcs.sk/otvorene-curz/kurz/ako-presvovat-predvovvate-presentacia-pred-kamera-mikrofonom-pred-ludmi