You can try
gst-launch uridecodebin uri=file:///home/Desktop/video.sdp ! ffmpegcolorspace ! videoflip method=clockwise ! ffmpegcolorspace ! autovideosink
Uridecodebin will parse and decode your input until raw format, while playbin is a full pipeline and has no pads to link to, it will handle decoding (it uses uridecodebin internally) and displaying the media to you. It has to be used as standalone element. You can try this, though:
gst-launch playbin2 uri=file:///home/Desktop/video.sdp video-sink="videoflip method=clockwise ! ffmpegcolorspace ! autovideosink"
It might work, too.