Complex sentence: It's also possible the source material will come in to play, while the mastered in 4k isn't that important, download sources don't necessarily get the same level of attention that Blurays get during production.
Split into simpler sentences: It's also possible the source material will come in to play. While the mastered in 4k isn't that important, download sources don't necessarily get the same level of attention that Blurays get during production.