Three main reasons:
For users on older devices running , finding a working version of YouTube can be tricky. While the current official YouTube app requires Android 8.0 or higher, you can still find legacy APKs or alternatives to keep your older tablet or phone functional. YouTube APK for Android 4.1.2 youtube for android 41 2 uptodown upd
era (Android 4.1 to 4.3), which introduced "Project Butter" for smoother animations. In the early 2010s, this YouTube update was revolutionary for several reasons: Design Shift Three main reasons: For users on older devices
This information is useful if you are looking to download an older version of the app, perhaps due to compatibility issues with a specific Android device or a dislike of newer UI changes. youtube for android 41 2 uptodown upd
System requirements and supported devices for YouTube - Google Help