Arte itself, maybe? I hit this quite frequently in the opposite direction. Try invidio.us, or duckduckgo. A VPN as a last resort. Or other channels.. I'd have uploaded it, but my upload is very slow today...

The documentary is nice, if a bit short. The target is a general audience, so you might not be missing out that much.

i second that! this is ridiculous. i am subscribed to many french channels but i have no idea why arte would ever block this video...

the kind of things that only happens to music videos

It's not unusual for videos from public TV networks to be region-locked, I think under the premise that it's funded by the tax-payers from a country, so those can get that content for free, but not people from other countries.