[afreecatv] fix 404 error

It fixes the bug where it gives 404 error when the link contains HIDE files.
Afreecatv seems to add HIDE files on some links which gives 404 error.

youtube_dl/extractor/afreecatv.py

@@ -313,7 +313,9 @@ class AfreecaTVIE(InfoExtractor):
                     r'^(\d{8})_', key, 'upload date', default=None)
                 file_duration = int_or_none(file_element.get('duration'))
                 format_id = key if key else '%s_%s' % (video_id, file_num)
-                if determine_ext(file_url) == 'm3u8':
+                if "HIDE.mp4" in file_url:
+                    continue
+                elif determine_ext(file_url) == 'm3u8':
                     formats = self._extract_m3u8_formats(
                         file_url, video_id, 'mp4', entry_protocol='m3u8_native',
                         m3u8_id='hls',