While I don't favorite my own videos (I mean, I made them, I can watch them whenever, why do I need to favorite them?), sometimes I kind of have to like my own videos whenever trolls out there keep hitting the dislike buttons just to troll me, so I have to at least add a couple of likes to outweight the like-to-dislike ratio. It's not so much a problem anymore, but back in the day, I often would 2-3 dislikes immediately after uploading a new video (back in the days of the star rating system, I'd get 1-star ratings immediately after uploading new videos). It got to a point where I did temporarily disable rating/liking and disliking to curb the trolls, but since then, YouTube has disabled disabling likes/dislikes, so whatever.