WordPress makes it super easy to add video from most of the major online sources. All you need to do is paste the link into the editor and WordPress takes care of the rest.
Here is a list of providers for which WordPress supports automatic embedding. YouTube or Vimeo are the ones we generally recommend for video hosting, but you’ll find most of the popular ones there.
Here’s a quick video of the process:
… and if you’re looking for the ducklings, here’s that one too!