While this video is labelled as Samia Gamal, it is actually Nemat Mohktar, dancer and actress during Egypt's cinema "Golden Era".
Nemat (Ni3met) was born in Alexandria in 1932 and was raised by dancer Nabaweeya Saleem. She began her prolific acting and dancing career in 1950. She was in more than 40 films in her approximately 25 year career.
I love her subtle, delicate movements that create a beautiful sensuality. AND of course there's that famous back bend!