Yfm (51): Mp4

: The lowest possible quality with the smallest file size.

: Video encoders like x264 use a "Constant Rate Factor" (CRF) scale from 0 to 51. Value 0 : Lossless (highest quality, massive file size). Yfm (51) mp4

: For the best balance between quality and compatibility, ensure your MP4 uses the H.264 (AVC) or H.265 (HEVC) codec. : The lowest possible quality with the smallest file size

Are you looking to a video in this format, or are you trying to fix a playback issue with an existing file? Yfm (51) mp4