mediatype-video-raw: add P012_{LE, BE}, Y212_{LE,BE}, Y412_{LE,BE} formats
The patches added descriptions for P012_LE/P012_BE/Y212_LE/Y212_BE/Y412_LE/Y412_BE
Edited by Haihao Xiang
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The patches added descriptions for P012_LE/P012_BE/Y212_LE/Y212_BE/Y412_LE/Y412_BE