In the documentary “Presenting Princess Shaw,” director Ido Haar follows the aspiring singer Samantha Montgomery as she pours out her original songs onto YouTube for a few dozen followers. Unbeknownst to her, the composer Kutiman watches her videos from an Israeli kibbutz and crafts music that will turn her into a viral sensation. Their collaboration “Stay Here” is one of 91 tracks eligible for this year’s Oscar for Best Song.

— Thom Powers and Raphaela Neihausen

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