Take the humble onion. It's sweet, tasty and offers a bit of a bite. What could it possibly have in common with a content management system? Actually, there's a strong similarity between the two. As Shrek famously said, "Onions have layers." The same can be said of content management systems (CMS).

The problem of formats and compatibility has been part and parcel of Web video since the beginning. Video technology has continuously changed over the years, and the current rising star is HTML5 video.