Posledné odpovede k Prime Video does not play HD videos, only very low qualityhttps://support.mozilla.org/sk/questions/13427112021-07-03T09:10:02-07:00If you don't get an answer here, see this Amazon forum thread. It's 6 months old but it may be hel2021-07-03T09:10:02-07:00AliceWymanhttps://support.mozilla.org/sk/questions/1342711#answer-1425602<p>If you don't get an answer here, see this Amazon forum thread. It's 6 months old but it may be helpful in explaining why some browsers like Safari on macOS support HD but not others:
<a href="https://www.amazonforum.com/s/question/0D54P00007r3ROxSAM/what-browsers-support-1080p-where-is-this-documented" rel="nofollow">https://www.amazonforum.com/s/question/0D54P00007r3ROxSAM/what-browsers-support-1080p-where-is-this-documented</a> What browsers support 1080p? Where is this documented?
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<em>On computers, Google's Widevine CDM {better known as the one used by Mozilla Firefox, and Chromium-based browsers such as Chrome itself, Opera, etc.} usually can offer only the least secure, sofware-based decryption (Widevine 'Level 3'), and might not be able to detect HDCP compliance. {It doesn't have these limitations on Android devices or ChromeOS notebooks.} On most streaming services with protected video, that translates to 720p or lower viewing quality.</em>
</p><p><em>By contrast, first-party browsers such as Apple's Safari on macOS, and MS Edge (using its MS PlayReady CDM) on Windows 10, are said to have access to private system functions which enable hardware-secured decryption, HDCP detection, etc. In turn, that translates to 1080p or higher viewing quality.</em>
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