Tumblr (legacy) Create a video post . YouTube New public video uploaded by you.

Post new YouTube video uploads to Tumblr

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When you upload a new video to YouTube, create a new post on Tumblr

Then

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Create a video post

This Action will create a video post on your Tumblr blog from the given URL to a YouTube video, a Vimeo video, a URL to a video file, or an embed code.