As any fool can plainly see, I do a lot of video embeds on this blog. Almost every time I do one, I get one (and only one) e-mail from someone who says, "You have the videos mixed up! The Randy Rainbow one is in the space where the John Oliver one is supposed to be!" Or something like that.
Once in a while, I do put the wrong video in a space but 97% of the time, the trouble is not that. It's that the cache on your browser is full and it's getting confused about what video goes in what space. If you clear your browser — which you should do every so often anyway — everything should appear in its proper location.