It was skymovieshd.

At 720p resolution, the file size is significantly smaller than 1080p, while the 10-bit encoding ensures that the image quality remains exceptionally crisp and vibrant, even on larger screens.

Back in 2010, downloading a 1080p or 4K video was impractical for the average household due to bandwidth constraints and rigid hardware limitations. Compression formats like H.264 (AVC) were standard, but advanced groups were beginning to experiment with 10-bit profiles to maximize efficiency.