WebCast is a free Chrome extension developed by Vitalii Tomkiv. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. The main purpose of WebCast is to find videos on the web page you're currently on and allow you to send them to your Chromecast device.

With WebCast, you can easily detect video files in .mp4 format that are being played on a webpage. Once the extension detects a supported video file, it adds a page action to your omnibox. This page action enables you to play the video on your Chromecast device with just a few clicks.

It's worth noting that this version of the plugin opens the video file in an external website that has a video player supporting Chromecast. This ensures seamless playback and a smooth viewing experience.

Overall, WebCast is a useful tool for Chromecast users who want to easily send videos from their Chrome browser to their Chromecast device. It simplifies the process and enhances the convenience of enjoying online videos on a larger screen.