Open a web browser on your laptop
Go to youtube.com
Sign in to your Google account if needed
Open the video you want to download
If you have YouTube Premium, click the Download button below the video
Choose the video quality if prompted
Wait for the download to finish
Open the YouTube app or YouTube website later to watch the downloaded video offline
If the Download button is not available, use YouTube Premium or check whether offline downloads are supported in your region
Do not use unauthorized third-party download tools for copyrighted videos