Ss std 8 sem1 vidio

 https://www.youtube.com/playlist?list=PLlOFY4Lgvs_Y-QP1pC5UjcAJBw6xyr6kJ 

Ss std video

 https://www.youtube.com/playlist?list=PLlOFY4Lgvs_Zwtkd2Hrq-N4ejc9FH5Sdr