Wikipedia:Wikipedia is not YouTube

This short clip adds value to the plasma globe article by providing information not possible to describe fully in text or in a static image.
In contrast the article-video File:Epilepsy video.webm adds nothing to the epilepsy article that could not have been published as text or static images.

Wikipedia is fundamentally a text-based encyclopaedia. Text forms the basis of our collaborative editing platform, how we record contributions and contributors, and how we present the bulk of the information. Images and audiovisual clips supplement the body text when they add value impossible with words alone.

Lengthy videos that cover all or a large portion of an article topic do not fit with our collaborative editing model, may be out-of-scope for the English Wikipedia project, and have verification and ownership issues. While some videos are educational and may fit within the broader educational goals of the Wikimedia movement, lengthy videos belong on Wikimedia Commons and perhaps on some other sister project. They generally should not be embedded in Wikipedia articles. If they are linked to, then they must conform to our external links guideline.