Toggling between live TV and streaming app with one button

Now that the NFL games are on YouTube TV, and some are on local channels, it would be nice to be able to toggle between live TV and YouTube TV with a single button press, preferably taking you directly to the last game you were watching within the YouTube TV app, rather than just going to the YouTube TV homepage (which I don’t know how to do either ). Does anybody know how to do this?

This is one big drawback compared with the NFL Sunday ticket being on DIRECTV, which allowed me to channel surf between games much more easily.