Most modern "all hdmoviearea 300mb" collections rely on the codec. This codec is roughly 50% more efficient than the older AVC (H.264). To the user, this means: a 300MB H.265 movie looks as good as a 600MB H.264 movie. If you see a "300MB" tag, check if it says x265 or 10bit . Those are the gold standards for tiny file sizes.
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