To sign in to YouTube, you'll need to create a Google Account. A Google Account lets you use many YouTube features including Like, Subscribe, Watch Later, and Watch History. Subscribe to the YouTube Creators channel for the latest news, updates, and tips.

Try updating your browser or clear your browser's cache & cookies. You can also check whether your browser extensions that block ads are affecting video playback. As another option, try opening YouTube in an incognito window with all extensions disabled and check if the issue continues.

Copy the desired YouTube video's URL and paste it into the designated field on SaveFrom.net. Click the "Download" button and view the list of available download links that appear. Choose your preferred video output format from the options provided, and initiate the download of your selected file.