[geekam]

It worked with my Chrome on Mac.

[quick_look]

I've tried Chrome, Safari, and Firefox on mine. The page loads, and the player loads, but the video does not.

[pwpwp]

The talk is also provided in other formats:

http://tele-task.de/archive/lecture/overview/5819/

[Cushman]

Did you check that link yourself? The only other format for this talk is Real— not all of us consider that an alternative.

[pwpwp]

There's also MP4 for the four individual sections of the talk (see phone icon).

[Cushman]

Ah, I didn't see that. Well, that's much less of a hassle than Real— thanks!