Nah. That's not taken from an album/soundtrack source. You can see that the title is being separated in square brackets. The announcement was just telling people that the TV Size version was now available for download. It's not a good way to infer the official title. As well, the official ending video, (and Funimation) don't have the "TV Size" tag so even if you convinced me that that source was credible, it would just mean "TV Size" would be optional as well for the title.
Anyone confused: Funimation has an official license for Attack on Titan, so they are an official source.
If you want to learn more about licensing, this is a good article to read: https://www.animenewsnetwork.com/feature/2012-06-13 (The "Copyright language subsection is a good summary). It's not a primary source of course, just for knowledge, not for citations.