There are plenty of YouTube video download tools out there; some of these are free, some are not. But you will be surprised to know that one of your old friends named VLC media player can easily download a video posted on YouTube; in this tutorial I will walk you through the process.
Step 1: In your web browser, open the video on YouTube you want download. Select the page address in the address bar and copy it with Ctrl + C (you can also click with the right mouse button on the link and click Copy).
Step 2: Start VLC media player and click on the Media menu and then click Open Network Stream.
Step 3: Click the Enter URL field network and paste the address of the YouTube video previously copied. For this, use the keyboard shortcut Ctrl + V, or right-click and then from context menu choose Paste.
Step 4: Click on the small arrow next to the Play button and click Convert.
Step 5: Under the section Destination file, click Browse button.
Step 6: Select a location to save the video file and give it a name. Be sure to specify the extension .mp4 after the file. Click Save.
Step 7: Select the profile Video – H.264 + MP3 (MP4).
Step 8: In order to get original file without conversion, click on “Edit selected profile” icon next to drop down menu.
Step 9: When new window opens up, first select “Video codec” tab and then select check box in front of “Keep original video track“.
Step 10: Now select “Audio codec” tab and then select checkbox in front of “Keep original audio track“. Click “Save” button.
Edited: Updated By Author Per User Request.