using legal means:
Select the official YouTube application from the search results. Click on the right side of the screen.
However, the patch didn't entirely eliminate the possibility of downloading YouTube on Switch. Some methods still work, albeit with certain caveats.
If you own a (one with the latest firmware updates or hardware that prevents unauthorized modifications), you might wonder if downloading YouTube videos is possible. The short answer is: officially, no. However, depending on your device's status and your technical comfort level, there are alternative approaches worth exploring.
Just because you can’t download within the app doesn’t mean you can’t watch YouTube offline on a patched Switch. Here are four legal workarounds.
Select install. Tinfoil will download the YouTube .nsp file and install it directly to your EmuMMC. Run: The app will now appear on your CFW home menu. Important Considerations for Patched/Modded Switch 1. The Risk of Banning