Because this is comedy, audio is half the experience. Look for versions with French DTS 5.1 or AC3 5.1. The "Ch'ti" accent is an auditory maze—the rear speakers often carry the ambient sounds of the town hall or the wind off the Channel.
English sites like The Pirate Bay or 1337x are often terrible for French content. You need to look at French-specific indexes. Unfortunately, major French trackers like T411 (now defunct) have been replaced by smaller private communities. Torrent Bienvenue Chez Les Ch Tis 1080P Tv
One major reason people torrent this specific file is for subtitles. The official streaming platforms often lock subtitles behind regions. If you download the Torrent Bienvenue Chez Les Ch Tis 1080P Tv: Because this is comedy, audio is half the experience