[pluralsight] prevent error 429 when sensing video formats

diff --git a/youtube_dl/extractor/pluralsight.py b/youtube_dl/extractor/pluralsight.py
index 7693282a59ababcf861695fed1ba06d7a7271fab..d542a9e0e8c60ac08921cc07bdcbcb99bd99c274 100644 (file)
--- a/youtube_dl/extractor/pluralsight.py
+++ b/youtube_dl/extractor/pluralsight.py
@@ -156,6 +156,9 @@ class PluralsightIE(PluralsightBaseIE):
                 format_id = '%s-%s' % (ext, quality)
                 clip_url = self._download_webpage(
                     request, display_id, 'Downloading %s URL' % format_id, fatal=False)
+                # #6989: sleep 3 seconds to avoid 429 errors.
+                # should help with #6842.
+                self._sleep(3, display_id)
                 if not clip_url:
                     continue
                 f.update({