UPDATE: See end for important note that obliterates most of the criticism in this post.
I can’t post Video through the Tumblr app. Here’s what happens when I try.
Ok, so how do you hook up a Vimeo account?
http://www.tumblr.com/help has no help. Searching http://www.tumblr.com/search?scope=help_docs&q=vimeo leads to one result (in English) http://www.tumblr.com/docs/en/api which links to http://www.tumblr.com/vimeo.
Which is 404.
Tumblr now supports direct video uploading but the app hasn’t been updated to support that.
Update: I emailed Tumblr support about this and they suggested that I delete the Tumblr app and reinstall it. I considered this to be a dumb suggestion, but tried it anyway… and it worked. After I deleted it and reinstalled it, the video that I took was uploaded to Tumblr’s own video service, and did not require Vimeo at all.
Still true: there’s also no way to do a simple thing such as linking to a YouTube or Vimeo file by URL as you can do in the regular posting format through the Dashboard.