J'ai vu et entendu et écouté plusieurs des dirigeants d'autres planètes
which translates to:
I saw and heard and listened to several of the leaders of other planets
so, yes, the translation is accurate.
As has been pointed out, Juncker is not a native French speaker - per Wikipedia, he is a native Luxemburgish speaker. I would also add that his position is a very demanding one and probably requires him to interact with other people in several languages on a daily basis, so you could expect a slip of the tongue from time to time.
Also, some British newspapers have claimed that he is an alcoholic (see here for one example) which might not help with concentration, at least in the long run.
Now, the video itself very much looks like others of him posted on the European Parliament's website (link), so it's probably him!