Yeah, virtue is basically showing that you have morals, so if you do it out of selfless goodness, you’re showing that you have good morals.
I mean when you say it like that, I guess you can’t really tell whether or not a person is doing something out of virtue, or just attention, but even if they’re doing it for attention, they are doing something good so it could count, and the person knows whether or not they’re doing out of virtue r not, so they know whether or not they can count it as a virtuous act.