Which skill is in demand on fiverr ?
you can take a look at the categories and make a research in the categories that you think are more suitable for your skills.
Only offer something for which you can provide a professional service.
See this: New Sellers … The True Way to Success!
Video editing ?
There’s never enough of that in the world.
From a design standpoint, I was told that fun creative multi-page document design could use more skilled sellers (doing brochures, catalogues, etc.).
Don’t know about the rest of the categories.
Just logout or try a new browser to open the Fiverr homepage. Scroll all the way and look around. The most highlighted parts are there and those are in high demand! My suggestion is to learn something what you love and can deliver comfortably.
Only create a gig that you are experienced in and qualified to do. Otherwise it will end badly.