Modify / Cache - manifest

[jokum]

When playback Video on Amazon, the player get a "manifest" with the playable items:

SmoothStreamingMedia MajorVersion="2" MinorVersion="1" Duration="15984640000">
<StreamIndex Type="video" Name="video" Chunks="799" QualityLevels="10" Url="QualityLevels({bitrate})/Fragments(video={start time})">
<QualityLevel Index="0" Bitrate="10000000" CodecPrivateData="..." MaxWidth="1920" MaxHeight="1080" FourCC="AVC1"/>
<QualityLevel Index="1" Bitrate="4000000" CodecPrivateData="..." MaxWidth="1280" MaxHeight="720" FourCC="AVC1"/>
<QualityLevel Index="2" Bitrate="2500000" CodecPrivateData="..." MaxWidth="1280" MaxHeight="720" FourCC="AVC1"/>
<QualityLevel Index="3" Bitrate="2000000" CodecPrivateData="..." MaxWidth="720" MaxHeight="404" FourCC="AVC1"/>
<QualityLevel Index="4" Bitrate="1350000" CodecPrivateData="..." MaxWidth="720" MaxHeight="404" FourCC="AVC1"/>
<QualityLevel Index="5" Bitrate="600000" CodecPrivateData="..." MaxWidth="720" MaxHeight="404" FourCC="AVC1"/>
<QualityLevel Index="6" Bitrate="450000" CodecPrivateData="..." MaxWidth="512" MaxHeight="288" FourCC="AVC1"/>
<QualityLevel Index="7" Bitrate="300000" CodecPrivateData="..." MaxWidth="512" MaxHeight="288" FourCC="AVC1"/>
<QualityLevel Index="8" Bitrate="200000" CodecPrivateData="..." MaxWidth="512" MaxHeight="288" FourCC="AVC1"/>
<QualityLevel Index="9" Bitrate="150000" CodecPrivateData="..." MaxWidth="512" MaxHeight="288" FourCC="AVC1"/>

is it possible t use proxyserver to cache this files, or modifythis manifest in a cache , that the player only gets:

<QualityLevel Index="0" Bitrate="10000000" CodecPrivateData="..." MaxWidth="1920" MaxHeight="1080" FourCC="AVC1"/>

and plays best quality ?