Yeah, the page is quite a disaster. The fonts are pretty terrible to read and it insists of saying all the dates and times in american format which makes it hard to glance -_-
I was glad to remember ublock origin has a 'block remote fonts' button.
You are right: the horizontal scroll only appears if you scroll down to the bottom of the page. But there is also a (more sensibly layouted) program shown on each streaming page (e.g. https://streaming.media.ccc.de/rc3/two, "Fahrplan" tab)
The phone apps are a lot more usable (and I think there’s a feed that can be put into your conference-schedule-app of choice somewhere, though I can’t find it now)
There is, just no scrollbar for some reason, but left / right keys work (at least in firefox)
Oh I tried that as well, but it turns out I had to click within the graph for left/right to work. Thanks!