ALLYouTube.Com is website which offers a service to easily download videos from YouTube in high quality video/audio format. You can download unlimited number of videos from youtube and you don't even need any membership.
Step 1: Paste the link of the video that you want to Download.
Step 2: Click the "Generate Links" button to generate download links.
Step 3: Click the "Download" button of the format you want to download.