Reel size & aspect ratios on Instagram | Instagram Help Center

The filename "1666728545738.mp4" refers to a timestamped video file likely generated by third-party downloaders, reflecting Instagram's reliance on MP4 format with H.264/AAC encoding. Optimizing Instagram videos requires adhering to specific aspect ratios, such as 9:16 for Reels, and managing bitrate, ideally keeping file sizes under 15MB for posts or 60MB for Reels, according to recommendations. For insights on optimal export settings, see the discussion on Reddit .

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Download Instagram 1666728545738 Mp4 May 2026

Reel size & aspect ratios on Instagram | Instagram Help Center

The filename "1666728545738.mp4" refers to a timestamped video file likely generated by third-party downloaders, reflecting Instagram's reliance on MP4 format with H.264/AAC encoding. Optimizing Instagram videos requires adhering to specific aspect ratios, such as 9:16 for Reels, and managing bitrate, ideally keeping file sizes under 15MB for posts or 60MB for Reels, according to recommendations. For insights on optimal export settings, see the discussion on Reddit .