I extracted a video URL with -g, but it does not play on
another machine / in my web browser.
It depends a lot on the service. In many cases, requests for the video (to download/play it)
must come from the same IP address and with the same cookies and/or HTTP headers. Use the
--cookies option to write the required cookies into a file, and advise your downloader to read
cookies from that file. Some sites also require a common user agent to be used, use --dump-us‐
er-agent to see the one in use by youtube-dl. You can also get necessary cookies and HTTP
headers from JSON output obtained with --dump-json.
It may be beneficial to use IPv6; in some cases, the restrictions are only applied to IPv4.
Some services (sometimes only for a subset of videos) do not restrict the video URL by IP ad‐
dress, cookie, or user-agent, but these are the exception rather than the rule.
Please bear in mind that some URL protocols are not supported by browsers out of the box, in‐
cluding RTMP. If you are using -g, your own downloader must support these as well.
If you want to play the video on a machine that is not running youtube-dl, you can relay the
video content from the machine that runs youtube-dl. You can use -o - to let youtube-dl stream
a video to stdout, or simply allow the player to download the files written by youtube-dl in
turn.
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