In the clip he starts by speaking English. Then he changes to speaking Arabic, during which he refers to Al Quds while the crawler at the bottom reads Jerusalem. At the end he again calls it Al Quds and clarifies by following up with ‘Jerusalem’.
I don’t know what the significance of this clip is but I think it should be seen by Americans. If Brennan is in fact a Muslim convert, and if he does not see Jerusalem as the capital of Israel, he is no friend to Israel or the Jewish people. The existence of Israel will be more uncertain if he is confirmed.