https://joy.videvo.net/videvo_files/video/free/2018-03/large_watermarked/180301_02_B_Rooftop_04_preview.mp4 Pigeons on a Hong Kong Rooftop Slow motion shot of pigeons taking flight from a city rooftop. 1080pabovebirdbuildingcityflightflyinghighpigeonroofskyscraperurbanwings