# rm makefile_profile.prev thread.c thread.h video_thread.c video_thread.h
# cd app
# cp ../../soln07c_video_playback/app/main.c .
** main.c
1. #include video_thread.h --> osd_thread.h
2. video_env --> osd_env (global variable declaration)
3. video_env.quit --> osd_env.quit in signal handler
4. videoThreadReturn --> osdThreadReturn
5. video_thread_fxn call --> osd_thread_fxn (plus return and env change)

