YouTube Watch Later – How to Link to a YouTube Video to Add to Watch-Later Queue

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I really like the watch later list/functionality on YouTube. If someone sends me a link though and I'm already watching some videos (perhaps on the watch later playlist), how can I send them straight to that playlist?

I know various alterations to the link can make it play at a certain time or at a certain size, turn off anotations etc. Is adding to the watchlater list an option?

Best Answer

As described here, there is an API method for doing that in the YouTube Data API.

The documentation describes a method of forming an XML text format that automatically adds a video to your Watch Later playlist.

It will not work for you out of the box but with some moderate programming experience you (or someone else) should be able to make an application using this (a Chrome extension maybe).

The request would look like this:

POST https://gdata.youtube.com/feeds/api/users/default/watch_later HTTP/1.1
Host: gdata.youtube.com
Content-Type: application/atom+xml
Content-Length: [[CONTENT_LENGTH]]
Authorization: Bearer [[ACCESS_TOKEN]]
GData-Version: 2
X-GData-Key: key=[[DEVELOPER_KEY]]

<?xml version="1.0" encoding="UTF-8"?>
<entry xmlns="http://www.w3.org/2005/Atom"
    xmlns:yt="http://gdata.youtube.com/schemas/2007">
  <id>[[VIDEO_ID]]</id>
  <yt:position>1</yt:position>
</entry>
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