Killing comment, change from wide to square

Signed-off-by: José Luis Di Biase <josx@interorganic.com.ar>
make uniform melt scripts

Signed-off-by: José Luis Di Biase <josx@interorganic.com.ar>
Readme: add script for video preview (stream)

Signed-off-by: José Luis Di Biase <josx@interorganic.com.ar>