RDP8 H.264 fullscreen mode:

HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations
ForceH264FullScreen

RDP8 H.264 recording options:

HKLM\Software\Policies\Microsoft\Windows NT\Terminal Services\H264Encoding
EnableRecord264
EnableRecordYUV
RecordPath

RDP8 H.264 encoder options:

HKLM\Software\Policies\Microsoft\Windows NT\Terminal Services\H264Encoding
EnableFullColorRange
EnableHighQuality
DisableFeatureMap
PeakBandwidthKbps
DisableRDPColorConversion
SetMaxQP