M24 | Did I do the right thing warning my ex (F21) about possible leaked private content?

I recently found a video online that strongly resembles my ex-girlfriend in an intimate situation. Her face isn’t visible, but based on body type, voice, and other details, I’m pretty sure it might be her.
I was conflicted about whether to tell her or stay out of it. In the end, I messaged her and told her I saw something online that looked a lot like her, and that I wanted to warn her in case someone shared private content without her consent.
I tried to keep it respectful and not invasive.
Did I do the right thing by telling her, or should I have stayed out of it?
TL;DR:I found a video online that strongly resembles my ex in an intimate situation. I warned her because I thought she deserved to know. Was that the right thing to do?