If this is from an active Orlando Theme Park forum member, then I'm sure that regular park guests don't notice it. (Atleast thats what I think.)
The videos are obviously old and need to be updated, and I'm not saying that getting the yeti working is a bad thing, I just don't think that making it move so that some people flying by in a coaster can see it fling it's arms around for a split second, will benefit Disney right now. Therefore, they aren't going to fix it because they have other things to be doing that are more important or that will benefit the company.