https://joy.videvo.net/videvo_files/video/free/2019-02/large_watermarked/181015_Extra_Bulgaria_HD_001_preview.mp4 Bulgarian Flag Flying Against Blue Sky Slow motion footage of the Bulgarian flag flying on a rooftop against a blue sky in Sofia, Bulgaria. 1080pbalkanbalkansbulgariabulgarianEuropeEuropeanflagflag poleflagpoleflyingnationnationalsofia