Here I have mentioned a method to download YouTube videos directly from Firefox. You just go to YouTube, watch a video, click a bookmark and the video starts downloading, without any software. Allow me to show you a method to download videos directly from YouTube using Google Chrome bookmarklet without using any software.
We will be needing a js file and a page containing form input field to do this task. What we are planning to do is, The input field contains default value. Onclick default value disappears and allows the user to insert text. If the user types anything it remains there but if he does not write anything and clicks at next input field than the default value reappears in previous field.