Mine

Cache size set to 320 KBytes
STREAM: [null] http://www.youtube.com/watch?v=_ZvLg_fIROA
STREAM: Description: http streaming
STREAM: Author: Bertrand, Albeau, Reimar Doeffinger, Arpi?
STREAM: Comment: plain http
CACHE_PRE_INIT: 0 [0] 0  pre:65536  eof:0
Cache fill: 17.50% (57344 bytes)
Checking for YUV4MPEG2
ASF_check: not ASF guid!
Checking for NuppelVideo
Checking for REAL
Checking for SMJPEG
Searching demuxer type for filename http://www.youtube.com/watch?v=_ZvLg_fIROA ext: .com/watch?v=_ZvLg_fIROA
Checking for Nullsoft Streaming Video
Checking for MOV
Checking for VIVO
header block 1 size: 33
Checking for PVA
Checking for MPEG-TS...
TRIED UP TO POSITION 69010, FOUND 47, packet_size= 0, SEEMS A TS? 0
Checking for LMLM4 Stream Format
Invalid packet in LMLM4 stream: ch=15393 size=1129601352
LMLM4 Stream Format not found
MPEG Stream reached EOF
ds_fill_buffer: EOF reached (stream: video)
MPEG packet stats: p100: 0  p101: 0 p1B6: 0 p12x: 0 sli: 0 a: 0 b: 0 c: 0 idr: 0 sps: 0 pps: 0 PES: 0  MP3: 0, synced: 0
Not MPEG System Stream format... (maybe Transport Stream?)
MPEG Stream reached EOF
ds_fill_buffer: EOF reached (stream: video)
MPEG packet stats: p100: 0  p101: 0 p1B6: 0 p12x: 0 sli: 0 a: 0 b: 0 c: 0 idr: 0 sps: 0 pps: 0 PES: 0  MP3: 0, synced: 3
Not MPEG System Stream format... (maybe Transport Stream?)
ds_fill_buffer: EOF reached (stream: video)
LAVF_check: no clue about this gibberish!
demux_aac_probe, failed to detect an AAC stream

vo: x11 uninit called but X11 not inited..

Exiting... (End of file)