I came across a very interesting article about demo reels and that if you want to start somewhere try to do one.
The problem is the choice of the video for me. What would be a great demo reel for an employer? something that has "unique" effects, or something that has the usual and all-time-classic sounds (walking, knocking, breathing, etc)?
After this decision do you have to suggest a good place to pick up interesting-for-sound-design-videos? or is it clearly a matter of personal choice and point of view?