Region 0 means all regions. If you have region 1 dvd player, it plays region 1 and region 0. No other regions. But of course these are factory settings that you can change. Look up the code on the internet and turn it into a region 0 dvd player, and you’re set to play any dvd.
On the film: Got the C’est la vie dvd myself, but haven’t watched it yet. Mauri’s reputation is not the best, but I enjoyed his Django Adios and, even more, Shotgun.