I have few questions regarding iOS native player i-e AVPlayer https://developer.apple.com/documentation/avfoundation/avplayer.
1. AVPlayer is open source or closed source? I cannot find its source code like ExoPlayer(Android) https://github.com/google/ExoPlayer
2. Are all available features of AVPlayer free of cost?
3. I have seen AVPlayer supports prerolls. Are midrolls, postrolls and banner ads also supported? AVPlayer only supports iAds or it can play ads from any Adserver?
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