4K Downloader: download and convert 4K and 8K Ultra HD …
https://www.4ksoftware.com/4k-downloader/features.html
4K Downloader automatically converts and optimizes downloaded videos for your mobile/desktop device, so you can watch them smoothly on your iPhone, iPad, iPod, Android phone, Android tablet, Xbox, PSP, PS4, PS3, Samsung Galaxy, or other device. Extract audio stream from video.
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