Fix subtitles in urplay
Fix subtitles in urplay

The subtitle url was relative (in particular it left out the scheme)
Never videos appears to use VTT/WRST format

iwconfig/svtplay-dl,olof/svtplay-dl,olof/svtplay-dl,spaam/svtplay-dl,selepo/svtplay-dl,selepo/svtplay-dl,dalgr/svtplay-dl,qnorsten/svtplay-dl,spaam/svtplay-dl,qnorsten/svtplay-dl,iwconfig/svtplay-dl,dalgr/svtplay-dl