Gotcha — if it only plays on YouTube now, then there aren’t any “reload Steam/Luna/EA app” style options left, just like you said: the license/access route is what ended, not your ability to run it locally.
In the thread I can see it’s the “end of license / thanks for playing” style shutdown notice, and the key part is that the distribution/license for that access method is ending, so playability stops there. game name (or paste the exact shutdown wording), I can help you phrase the most accurate “what happened / what’s still playable” explanation for the forum—without any sketchy workarounds.