Oh hi @donatello I'm very delighted! Nice to meet you here on Steemit!
Big thanks for qualifying my post! ok well noted on 1 minute long dance. ☺️
Yeah, i cant seem to post videos directly here on Steemit. I dont think they have. It looks only video links will do like Youtube, Facebook etc.

And also, I didn't see how many minutes long on the rules posted:

"How to enter:
One entry per person only.
This dance contest is aimed at people over 18 years old.
Write a post on any platform or community that you like. You will need to share your link and video here as a comment.
The title should be, "Online dance contest week 171" or "Dance contest week 171" followed by "My entry and @yourusername".
Please use #dance as one of the first five tags.

Alternatively:
Share your dance video here as a comment. Feel free to write a description.

You have to post your dance video by next Saturday, 21/11/20. "