Use the YouTube app’s offline download feature if you have YouTube Premium
Open the YouTube app on your phone
Find the video you want to save
Tap the Download button below the video
Choose the video quality if prompted
Wait for the download to finish
Open the Library or Downloads section in the YouTube app to watch it offline
If the Download button is not available, the video may not support offline downloads
Use only legal and authorized methods to download videos
Avoid third-party apps or websites that may violate YouTube’s terms or risk your phone’s security