Intermittent error downloading heavy requested video

[luigirosa]

Happens sometimes (say 1 every 10 try) while downloading a heavy requested video with the latest version of software. On 9 on 10 times the error is 403 - Forbidden

$ ./youtube-dl --verbose -f 37 http://www.youtube.com/watch?v=NoLpRKEDVAQ
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', '-f', '37', 'http://www.youtube.com/watch?v=NoLpRKEDVAQ']
[debug] youtube-dl version 2013.10.04
[debug] Python version 2.7.4 - Linux-3.8.0-32-generic-x86_64-with-Ubuntu-13.04-raring
[debug] Proxy map: {}
[youtube] Setting language
[youtube] NoLpRKEDVAQ: Downloading video webpage
[youtube] NoLpRKEDVAQ: Downloading video info webpage
[youtube] NoLpRKEDVAQ: Extracting video information
ERROR: requested format not available; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
Traceback (most recent call last):
File "./youtube-dl/youtube_dl/YoutubeDL.py", line 335, in extract_info
ie_result = ie.extract(url)
File "./youtube-dl/youtube_dl/extractor/common.py", line 103, in extract
return self._real_extract(url)
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1462, in _real_extract
video_url_list = self._get_video_url_list(url_map)
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 1234, in _get_video_url_list
raise ExtractorError(u'requested format not available')
ExtractorError: requested format not available; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.

[jaimeMF]

About the 403 error, I can't reproduce it, but the output you posted seems to be caused because youtube doesn't always serve the same formats, for example in https://travis-ci.org/rg3/youtube-dl/jobs/12130890#L377 it doesn't serve the best mp4 format.