This is a quick tutorial on how to use Scratch on your Xbox. Me and my friend wanted to see our game on the big screen so we figured this out. An alternative method (a little harder) is to run an HDMI cord from your tv to your computer (you need an HDMI to USB converter and if you are using a new Mac a USB to C converter). This tutorial works for xbox 1s and above.
UPDATE NOVEMBER 2020: This is projected to work with the Series S and X coming out this month. Images from Scratch and Microsoft. Music from Bensound. Thanks for checking this out, and I hope it helped you! Want to learn how to do it on PS4? Check this out: https://scratch.mit.edu/projects/385260812/