It may be impossible if that website doesn't provide an app that supports casting to Chromecast. Video Caster enables online video playback on Chromecast in such a comfortable way. Just open the website, connect to the chromecast and play the video. Features: • Supports HTML5 videos. • Supports subtitles. • Keeps video playing on Chromecast while iPhone, iPad screen is turned off. • Restores the webpage after quitting. Basic usage: - Copy the video link from Safari. - Open Video Caster then the website is automatically loaded. - Touch cast button to connect to Chromecast device. - Play the video on the iPhone/iPad and the video is played on Chromecast automatically. System requirements: • iPhone, iPad or iPod touch with A7 chip and above. • Google Chromecast gen 2 or Chromecast Ultra device. Network requirements: • Internet connection. • iPhone/iPad and Chromecast must be connected to the same IP version 4 WiFi network.