Yes it was weird, but I have an explanation for this that I hope will be satisfactory. As you can see I was mostly looking at my phone, so it didn't occur to me that she was dizzy and probably didn't know where she was going. I thought she was just trying to interact with me like a mascot costume person at a sporting event. In my experience they usually get a little mad if you don't interact back, so I normally give them a hug. I tried to give her a hug, as you can see by my arm at the end of the video, but I realized that if I gave her a hug I could very likely rip the head clean off. I panicked at this realization and opted for a forehead kiss instead. It absolutely was not planned.
I'd also like to point out that this all happened over the course of about half a second, I had no idea she was walking towards me until I turned my head. The Nintendo employee with her didn't seem very upset at me and kinda laughed, she was the person saying "You're precious, alright let's- watch out, watch out, aww" in the video, which I'd like to emphasize I couldn't hear because conventions are very loud. They both went the way they were going after this video, so I don't think they took offense.
I feel like I'm on trial here but yeah that's what happened. I wouldn't want to make someone uncomfortable on purpose, whenever I took a picture with anyone else at the convention I asked and then asked if I could be in the picture and so on, and there was no kissing anywhere else I assure you, but this all happened faster than I could really think about it.