C'est bien ça! merci kgersen!
edit:
donc logiquement il faut changer la valeur de var using = :
0 ["none", "Local server", "none"],
1 ["GL", "Level3 cdn", "twitch2-live.hls.adaptive.level3.net"],
2 ["US-1", "San Francisco", "video-edge-2ca3e4.sfo01.hls.ttvnw.net"],
3 ["US-2", "Seattle", "video-edge-7ea618.sea01.hls.ttvnw.net"],
4 ["US-3", "San Jose", "video-edge-7e96ac.sjc01.hls.ttvnw.net"],
5 ["US-4", "Chicago", "video-edge-835140.ord02.hls.ttvnw.net"],
6 ["US-5", "Washington", "video20.iad02.hls.ttvnw.net"],
7 ["US-6", "New York", "video20.jfk01.hls.ttvnw.net"],
8 ["US-7", "Los Angeles", "video20.lax01.hls.ttvnw.net"],
9 ["US-8", "Dallas", "video20.dfw01.hls.ttvnw.net"],
10 ["SE", "Stockholm", "video20.arn01.hls.ttvnw.net"],
11 ["UK", "London", "video20.lhr02.hls.ttvnw.net"],
12 ["NL", "Amsterdam", "video20.ams01.hls.ttvnw.net"],
13 ["FR", "Paris", "video16.cdg01.hls.ttvnw.net"],
14 ["DE", "Frankfurt", "video20.fra01.hls.ttvnw.net"],
15 ["CZ", "Prague", "video20.prg01.hls.ttvnw.net"]