Merge pull request streamlink#1474 from unnutricious/bigo

[bigo] update video regex to match current website (streamlink#1412)

src/streamlink/plugins/bigo.py

@@ -52,7 +52,7 @@ class Bigo(Plugin):
         r'''^\s*(?<!<!--)<param.*value="tmp=(\d+)&channel=(\d+)&srv=(\d+\.\d+\.\d+\.\d+)&port=(\d+)"''',
         re.M)
     _video_re = re.compile(
-        r'^\s*(?<!<!--)<source id="videoSrc" src="(http://.*\.m3u8)"',
+        r"""videoSrc:\s?["'](?P<url>[^"']+)["']""",
         re.M)
 
     @classmethod