To make the web entirely like a TV, everything should be rendered on canvases. To let you truly deploy your org chart, each team should be responsible for one isolated canvas.
For example you could set cookies before visiting another website. This is currently impossible in an iframe but possible in a browser.
I've wanted to do this to automatically login users on some external websites.
That's a security feature. If you would have that in any environment it would be massive security issue. If you actually own the service you can still do that.
To make the web entirely like a TV, everything should be rendered on canvases. To let you truly deploy your org chart, each team should be responsible for one isolated canvas.