Wikipedia is a great resource on the Internet, especially if you want a quick overview over a certain topic of interest. While it is usually not perfect, you should not use it as your main source of scientific research for instance, you may very well use it to quickly look up things that you want to know more about.
All information on Wikipedia are textual, with images thrown in to the mix whenever available. If you are more a visual learner, you may prefer video tutorials or information about certain topics as well.
While you can head over to YouTube or another video hosting website to search for videos that cover the topic, you may also use the Google Chrome extension WikiTube for that.
The extension adds related videos to the top of every Wikipedia page. If you open the Hydroelectricity page for instance, you get three videos there which explain how Hydroelectricity works. To the right of that is a plus icon which, when clicked on, adds another set of videos to the page, so that you can browse more videos while you are or on it.
The concept works best on scientific pages on Wikipedia. You get great results on most science-based queries, for places, people, and music for example.
You may get the occasional hiccup though on pages where the selected videos do not really match the topic at all. If you open the technology portal for instance, you get videos about the games Portal and Portal 2, and not technology in general.
Videos can be played directly on the Wikipedia page. This is great for many queries, but music shines in this regard. You can play the music and read the article at the same time. While you can do so as well in two different browser tabs, it all gets a tad more comfortable this way.
WikiTube adds unobtrusive videos to every Wikipedia page that may help you in your information finding process. It works very well for certain kinds of searches, music, people or technology to name a few, and may provide you with additional information that you would otherwise not get on Wikipedia itself.
The videos add another dimension to Wikipedia, one that the site has been lacking ever since it was published on the Internet.