I first tried this Add-On on my Opera Browser! Wow! Incredibly fast and simple w just one click! But if resolution is not allowed on your monitor, you have to choose from the menu beside the Green Arrow below the video you will be downloading. Then, downloading meters will appear on the top right corner of the browser.

Klasss

es la mejor, lejos. la unica que funciona y es simple.

Awesome addon, save my day by downloading complete youtube playlist in couple of Clicks.... Truly Awesome. I used this since last 3 years