I was very disappointed that my Toshiba TV's built in Chromecast did not support Disney+, even though Chromecasts are supposed to work. So with very little hope, I dusted off my Forge TV earlier, which can't even run Netflix, and to my surprise I was able to directly install the Disney+ app from the Play Store and I can even cast to it like a Chromecast (which again doesn't work with Netflix)!
Unfortunately it's only in 1080p, but I'll take what i can for now...
Now that's a name I've not heard in a long time...a long time.