A:AnswerUnfortunately, the Xfinity app is not available for download on this TV.
You can hook up your external Xfinity streaming device into one of the HDMI inputs on the TV.
A:AnswerThere is. While video is playing click the settings button to n the remote, then select picture. From there you can manually adjust contrast, backlight,etc.
A:AnswerThe Disney+ app is there for download. It's under the "Apps" menu on the home screen among the "featured" apps. Scroll down to the "Entertainment" category and you should see it there.