This indicates the source material was the physical DVD box set, which often includes the extended versions of the episodes that weren't seen on original TV broadcasts or modern streaming platforms like Max.
Joey develops a painful hernia right after his health insurance expires. To avoid paying the hospital bill, he tries to "act" through the pain during auditions, leading to some of Matt LeBlanc's funniest physical comedy. Watch Friends s06e04 dvdrip x264-sonix-1
The string dvdrip x264-sonix-1 refers to a specific digital copy sourced from the original DVDs. This indicates the source material was the physical
Rachel finds out that Ross never actually filed the paperwork for their annulment, meaning they are still legally married. Technical Note: x264-SONIX Watch Friends s06e04 dvdrip x264-sonix-1
This is the name of the "release group" that encoded the video.