This is actually their DRM speaking. If you watch it on a Linux device or basically anything that isn’t a smart TV on the latest OS, they limit you to a 720p low bitrate stream, even if you pay for 4k. (See Louis Rossman’s video on the topic)

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jsheard 9 hours ago | parent | next [-]

OP said they're using an Apple TV, which most definitely supports the 4K DRM.

	▲	array_key_first 8 hours ago \| parent [-]
		The bit rate is unfortunately crushed to hell and back, leading to blockiness on 4K.

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misiek08 2 hours ago | parent | prev [-]

Have same experience as OP on newest ATV 4k. Good it's not only me who wonders how is it possible that they describe such great approaches to encoding, but final result is just so bad.

Good that the OCAs really work and are very inspiring in content delivery domain.