An app that helps you watch videos ONLY from the YouTube channels that you are interested in and not any algorithm recommendations.
Stay focused! 
Install instructions -
Please use this github link to download all files. The App gallery doesn't allow me to upload .zip files -
https://github.com/thatapiguy/Youtube-Deck-using-PowerApps-and-Flow
Import the .zip file in PowerApps and upload the excel file in your OneDrive . Delete the exisiting OneDrive connection in the PowerApp and then add a new OneDrive connection that connects to the 'Channels' table in the spreadsheet.