Specialized mobile websites scraped YouTube, converted the video streams into low-resolution 3GP formats on their own servers, and provided direct download links to mobile users.
To maintain small file sizes, 3GP videos operated at significantly lower bitrates and reduced framerates (often 15 frames per second or lower), resulting in a noticeably pixelated and sometimes choppy viewing experience. 3gp king youtube full
As microSD cards grew into the hundreds of gigabytes and 4G LTE became common, the extreme compression of 3GP (which often looked pixelated and blurry) was no longer acceptable to users. Security and Legal Considerations Today Specialized mobile websites scraped YouTube