HTML Producer - CasparCG/help GitHub Wiki
The HTML Producer allows you to load a hosted HTML page into CasparCG. Unlike HTML Templates, pages loaded through the HTML Producer can't be controlled by CasparCG.
To use the HTML Producer in a PLAY
command, type something like this: PLAY 1-1 [HTML] "https://deniosoftware.com"
For a more comprehensive guide to building templates in HTML please see this guide by CasparCG user Christopher Ouelette.