I got this question a few times. The bloopers that seem new to you were only released about two years ago on the Friends Blu-Ray set. Now don’t fret, that’s the only advantage of the Blu-Ray box because they don’t even have the extended episodes.
Someone was so kind and had them uploaded on vimeo, but as far as I’m aware that video is gone. I don’t know of another video so I’m afraid we can’t watch them at the moment (other than what the gifsets show us).