Add warning message to README

Author: dmunozv04

README.md

@@ -11,6 +11,11 @@ or intros) in YouTube videos using the [SponsorBlock](https://sponsor.ajay.app/)
 API. It can also auto mute and press the "Skip Ad" button the moment it becomes
 available on YouTube ads.
 
+[!WARNING]
+YouTube appers to have changed the screen ID code format and is in the process
+of revoking all existing codes. This means that you'll have to pair your
+device again. You can find information on how to do that in the wiki.
+
 ## Installation
 
 Check the [wiki](https://github.com/dmunozv04/iSponsorBlockTV/wiki/Installation)