Well, it has been confirmed by reliable sources that the missile that hit the train station in Kramatorsk was indeed a Tochka-U, but Belarus also uses these missiles, and Russia certainly has access to them.
I'm willing to consider that Ukraine fired this missile on its own people to drive support for the war, but I'm going to need more evidence than what you've provided. You posted a photo from a video, not the entire video itself.
We live in a world of unparalleled disinformation. That missile could have been fired by Ukraine, Belarus, or Russia, and your single photo does not provide proof in any direction. Can you post the entire video for analysis, please?