There are several ways to download YouTube videos without using any software. Here are a few options:
Using an online video downloader: There are many websites that allow you to enter the URL of a YouTube video and download it to your computer or device. Some examples of online video downloaders include SaveFrom.net and Y2mate.com.
Using a browser extension: There are several browser extensions that allow you to download YouTube videos directly from the browser. Some examples include Video DownloadHelper (for Firefox) and Fast Video Download (for Chrome).
Using the “Save as” feature in your browser: In some browsers, you can right-click on a YouTube video and select “Save as” to download the video to your computer.
Using YouTube’s own “Save offline” feature: If you have the YouTube app installed on your mobile device, you can use the “Save offline” feature to download YouTube videos for offline viewing.
Note: Keep in mind that downloading YouTube videos for purposes other than personal use may violate the terms of service of YouTube and could potentially be illegal. It is important to respect the rights of the creators and only download videos for personal use.