A rough trick to get around the two different json styles medialaan seems to be using.
Fix for these example videos:
https://vtmkzoom.be/video?aid=45724
https://vtmkzoom.be/video?aid=45425
The old code hit an error when it attempted to parse the string
"adaptive" for video height. Actually parsing the returned playlists is
a good idea because it adds more output formats, including some
audio-only-ones.