model: refactor stream_info attribute on playlist
model: refactor stream_info attribute on playlist

cristina0botez/m3u8,pbs/m3u8,bertothunder/m3u8,gabrielfalcao/m3u8,pbs/m3u8,cnry/m3u8,neon-lab/m3u8,feuvan/m3u8,cristina0botez/m3u8,gabrielfalcao/m3u8,cnry/m3u8,bertothunder/m3u8,feuvan/m3u8,neon-lab/m3u8