Well, since this is a reblogged Tumblr post, I figured that the source might lie at the original post. My initial naïve strategy was to simply keep clicking the "reblogged from" links (marked by the little arrow cycle below the post content), which would
eventually lead me to the original post (although it could take quite a lot of clicks, depending on how long the chain of reblogs is). However, this didn't work, since (as is common with long reblog chains) I eventually hit a Tumblr blog that had been removed, and there's no built-in way to jump over it. After checking archive.org and search engine caches for this dead page and finding nothing, I was stumped.
However, I then realized that Tumblr's API might have a function for returning the original function of a reblog—and sure enough, it does! I'm not very skilled, but thankfully, Tumblr provides
a developer console which you can tool about with once you've registered for and received your API keys. Once you've done that and entered them into the console, you can choose your functions from a simple drop-down menu interface and put in the necessary info, and it'll put together the function and display the output for you when you click "Example Output."
In this case, I went to the relevant section (
/calls/blog/posts), filled in the relevant info from your link (Blog Name: k-hotstuff.tumblr.com, Type: video, ID: 157374347984 (just the number in your Tumblr link)), checked "Reblog Info", and clicked "Example Output." The relevant info is everything beginning with
reblogged_root_:
Code:
"reblogged_root_id": "146183398608",
"reblogged_root_url": "http://av-modoo.tumblr.com/post/146183398608/사쿠라-유라-품번-kawd-715-간편가입하고-무료다운",
"reblogged_root_name": "av-modoo",
"reblogged_root_title": "AV모음소",
"reblogged_root_uuid": "av-modoo.tumblr.com",
"reblogged_root_can_message": false,
"reblogged_root_following": false,
Now, that link was also dead, but as you can see, the catalog number is right there in the URL!