Well one reason is there are many many different legal jurisdictions involved that handle media distribution differently. Licensing and copyright agreements are all over the place. Most of this stuff predates the internet from what little I know, so you have the typical legal clash between the last generations rent seekers and todays.

You can try their website [0].

Their documentaries seem to be subtitles in English, Polish, Spanish and Italian (in addition to the original French/German that is typical for all Arte programs).

So my guess would be it is made available for European Union only. Although you could argue that there are not many countries left in the EU whose main language is English.

[0] https://www.arte.tv/en/videos/089086-000-A/the-blade-runner-...

When I tried to open the video with mpv this showed up:

> This video is available in Andorra, Austria, Belgium, Bulgaria, Saint Barthélemy, Switzerland, Cyprus, Czech Republic, Germany, Denmark, Estonia, Spain, Finland, France, United Kingdom, French Guiana, Guadeloupe, Greece, Croatia, Hungary, Ireland, Iceland, Italy, Liechtenstein, Lithuania, Luxembourg, Latvia, Monaco, Saint Martin (French part), Martinique, Malta, New Caledonia, Netherlands, Norway, French Polynesia, Poland, Saint Pierre and Miquelon, Portugal, Réunion, Romania, Sweden, Slovenia, Slovakia, San Marino, French Southern Territories, Holy See (Vatican City State), Wallis and Futuna, Mayotte.

You could try downloading it.

https://www.youtubepp.com/watch?v=uUz_vA06ffA

Someone in a beret smoking a cigarette laughs at your troubles.

Arte is a French/German public TV channel (excellent one in my opinion). I guess this video is blocked outside these two countries (also available in Belgium, Monaco, Luxembourg, Austria, and Switzerland I think)

Not available in the N.Z. :/

Or AU