Check on the X packages of ltib system build and you can find Xfbdev. Without it isn't possible to have a Window where "attach" the video to play.
this is the list of gstreamer's Freescale plugins that you have on your system if you add the package into the ltib build:
mfw_vpudecoder: mfw_vpudecoder: Freescale: Hardware (VPU) Decoder
mfw_downmixer: mfw_downmixer: Freescale Audio Down Mixer
mfw_aacplusdecoder: mfw_aacplusdecoder: Freescale AAC Decoder Plugin
mfw_deinterlacer: mfw_deinterlacer: Mfw De-interlace
mfw_wma8encoder: mfw_wma8encoder: freescale wma8 encoder
mfw_audio_pp: mfw_audio_pp: Freescale Audio Post-process Filter
mfw_vpuencoder: mfw_vpuencoder: Freescale: Hardware (VPU) Encoder
mfw_aacdecoder: mfw_aacdecoder: Freescale AAC Decoder Plugin
mfw_v4lsink: mfw_v4lsink: Freescale: v4l_sink
mfw_v4lsrc: mfw_v4lsrc: Freescale Video Source plug-in
mfw_avidemuxer: mfw_avidemuxer: FSL Avi Demuxer
mfw_mp3encoder: mfw_mp3encoder: freescale mp3 encoder
mfw_mpg2demuxer: mfw_mpg2demuxer: Freescale MPEG demuxer
mfw_mp4demuxer: mfw_mp4demuxer: Freescale-Mp4 demuxer plugin
mfw_wma10decoder: mfw_wma10decoder: Freescale's wma10 decoder
mfw_asfdemuxer: mfw_asfdemuxer: FSL Asf Demuxer
mfw_mp3decoder: mfw_mp3decoder: freescale mp3 decoder
the samples that i send to you must be changed, because you have to use Freescale mfw_* plugin, and not the standard one (ie. mfw_v4lsink and not xvideosink).
try the "playbin" way, because it's easy to implement.
To have a fullscreen window, you must create a X window of the same size of the desktop and "attach", with the command "gst_x_overlay_set_xwindow_id, the gstreamer video on it.
You have to learn how gstreamer and X Windows worksto create your application.