Dear Sailesh,
If you deem it acceptable, there is this video I made to explain my teaching of Wikipedia. It's 3 minutes long instead of 30s long, but you can tailor it to your needs. It's in French but I can provide a translation in English of the transcription if you wish. I can even come in person as I live in Paris :)
youtube version : https://youtu.be/SlrPhdSu5O4
transcription as a "The Conversation" article : https://theconversation.com/enseigner-wikipedia-par-les-anecdotes-73537
wikimedia commons version : https://commons.wikimedia.org/wiki/File:Enseigner_Wikipedia_Par_Les_Anecdote...