Depending on your platform, "installing" viral video capability usually follows one of these paths: Script Integration (Self-Hosted Blogs):

No special “install” required — just a browser.

We’ve all seen the stats: A 17-second cat video gets 80 million views. A teenager lip-syncing in their bedroom launches a global dance craze. A SaaS founder explaining a boring compliance feature gets 500,000 shares on LinkedIn.