“That is exactly what I want to do though.”
You can make a shortcut/launch icon for your home screen on any phone. But clicking it still goes through the browser and you are still at the mercy of the ads on players or the site you go to it’s self. It is just a shortcut that still opens it in the other needed apps to render and play.
Unless the site has a “make available offline” option I’m not sure you can do what you want.
Thank you!