I can give my perspectives to the idea that she is not a gamer, if you'd like; The quote from the video that she actually said those things states that she doesn't consider herself a fan of video games, or a part of the fandom at that time. This is different from not playing games; many people play video games, but do not consider themselves gamers, espsecially given the stigma tied to its stereotypes(some justified, some not). Gamer is an identity, not based on amount of play time; if she says she's a gamer, she IS a gamer. This means she can not be a gamer 3 years ago, and be a gamer recently.
That's fine and dandy but doesn't really answer my query: we have audio from her on two different occasions making contradictory statements.
Now it's one thing if she had said "I didn't used to be a gamer, but I grew to love it". That would be consistent with both statements. That is not, however, what she said. She said that she had "always been a gamer", which contradicts her earlier statements (in front of a different crowd) that she was not a gamer.
Now whatever stance you take on her personally, you have to admit that these two statements cannot co-exist. Meaning that there's a problem with one of them. What many have said, given the differences between her audience then and her audience now, is that she's changed her opinion so as to better appeal to the crowd she's currently talking to. And while I can't be sure of that myself, it is rather difficult to argue otherwise when the audio makes no mystery about it.
So at the very least, yes, I have to say that I consider her somewhat dishonest, because either she was lying back then to "cover up" her gaming habit (which is sad, because it suggests that this hobby she supposedly loves so much was somehow embarrassing to her at the time), or she is lying now when she says that she's an avid gamer (which would be much worse, because it's intentionally misleading her audience). I don't think it matters if she's a "gamer" or not, but I think if she's willing to change her tune on something that small, then it does add some degree of doubt to her stances on more important things.