Open YouTube and find the video you want to download
Check whether the video creator or YouTube Premium offers an official download option
If available, tap Download (or the Download icon) on the video page/app
Use the YouTube app’s Downloads section to access the saved video offline
If no official download option exists, use a third-party tool only if it complies with the video’s license and local laws
Choose a reputable downloader that supports the platform and video format you need
Copy the video URL
Paste the URL into the downloader
Select the desired quality/format (preferably MP4)
Start the download
Save the file to your device storage
Verify the downloaded file opens correctly in your media player
Keep the downloaded file organized and back it up if needed