You either have a clipboard hijacker or you're trying to get attention. The cursor in your video randomly skips right after clicking the search box at 0:31, jumping right to the Buy button. It looks like you paused the video, copied the other address and then resumed it.

If the video is indeed legit, this isn't a normal action that happens on a PC so get yourself a thorough virus and malware check. But there's no point in calling it an Etherscan scam - it has nothing to do with their website, why jump straight to the accusation?