viaplay: Show a error message from the site when we can’t find the id.
viaplay: Show a error message from the site when we can’t find the id.

this will show two error message but we will fix that later after http-rewrite.
this fixes #129
OakNinja/svtplay-dl,spaam/svtplay-dl,qnorsten/svtplay-dl,dalgr/svtplay-dl,iwconfig/svtplay-dl,olof/svtplay-dl,leakim/svtplay-dl,dalgr/svtplay-dl,iwconfig/svtplay-dl,spaam/svtplay-dl,qnorsten/svtplay-dl,leakim/svtplay-dl,leakim/svtplay-dl,selepo/svtplay-dl,OakNinja/svtplay-dl,OakNinja/svtplay-dl,olof/svtplay-dl,selepo/svtplay-dl