congratulations by your super program,
i have a amdk6 450 MHz, Wary 53 ,and with resolution 240 i can see a lot of videos of youtube but others not and the solution is download this video and from console execute:
mplayer -quiet -vo x11 -ao alsa -vfm ffmpeg -lavdopts lowres=0:fast:skiploopfilter=all -cache 8192 /folder/Video.mp4
and all ok good sync sound/video.
but when i write this inside gtk/youtube viewer ,,/preferents/configuration/mplayer arguments:
"-quiet -vo xv -ao alsa -vfm ffmpeg -lavdopts lowres=0:fast:skiploopfilter=all %d",
i can not see with sync the video, can you tell me please why, thanks