You need to start a terminal windows from program->accessories->terminal. There you enter the command "GST_DEBUG_NO_COLOR=1 GST_DEBUG=*:2 totem 2> log.txt". This will start totem and create a log file called log.txt in your home directory. Once the error has occurred you can exit totem and attach the log file to this bug report.
You need to start a terminal windows from program- >accessories- >terminal. There you enter the command "GST_DEBUG_ NO_COLOR= 1 GST_DEBUG=*:2 totem 2> log.txt". This will start totem and create a log file called log.txt in your home directory. Once the error has occurred you can exit totem and attach the log file to this bug report.