His presentation was effective and entertaining because he was well prepared, the video was properly cued and the television was working. Clearly describe each step of the process as you demonstrate it. Demonstrate how to operate, repair, clean, polish, build or create something, for example. I once demonstrated how to start an African violet plant from a leaf at a Toastmaster club meeting. Most audiences enjoy becoming involved in presentations, particularly if they've been sitting for a long while.
Involvement often promotes a greater degree of learning and understanding.
I once taught a line dance routine at a Toastmaster meeting. Involve the audience by opening the meeting to questions. One former Toastmaster and CTM recently gave an entire presentation using questions and answers. She found it effective because she was presenting her material while also addressing the specific concerns of the audience. You're addressing additional senses and the more senses involved, the greater the impact of the message or lesson.