Since its nounage was baity enough to elicit off-topic snark, I guess we'll go for the gerund.

Actually the title was originally "Model3 Unveil Live-stream [video]" but it mysteriously changed to what it is now. I'm not complaining though.

We changed it to the page title, which is what the HN guidelines ask you to use in the first place, unless it is misleading or linkbait.

Thank you for simply correcting it instead of just deleting it. I didn't mean to do that.

You're most welcome, but just so you know, we'd never delete a story for that reason. That would be an awful lot of deletion :)