I would suggest Chaim Yisrael’s “Ten Li Ahava” (it’s the sixth
song on Milim shel Tfilla, if the name’s wrong).
Other options include his “Yodayim L’mala” and “Rak Elokim” (the eighth and eleventh songs on that album), and
Itzik Eshel’s “Im Ein Ani” (first song on Rak Ata/Only You). His “Rak Ata” and “Eizeh Keif” (the seventh and ninth songs on that album) are less intense options if that’s what you’re looking for.
(“Im Ein Ani” uses the whole ma’amar and should not be
confused with “Eizeh Keif,” which uses only part of it.)
Also, here are some questions that might help:
Will this be a live event?
How long a clip do you need?
Would an instrumental non-Jewish song be OK (what if it sounds Jewish)?
(Have you tried asking people who have Step It Up for suggestions?)