Likely the specific release group or internal tagging used by the uploader. Relevant Links & Resources
A "Web Rip" or "Web Download" that has been remuxed (re-packaged) without re-encoding the original video stream to maintain quality. Ita_Eng: Contains both Italian and English audio tracks. Ac3: The audio is encoded in AC-3 (Dolby Digital) format. The_Originals_3x20_WEBMux_Ita_Eng_Ac3_Ba79-iCV-...
See fan reactions and theories on the Official Reddit Thread . The Originals recap: Where Nothing Stays Buried Likely the specific release group or internal tagging