Pls explain anyone

Guys pls explain and make me understand....... Can anyone who understood cmpltly answer my questions........ Im cmpltly lost after watching this...........................,.,,.,.,.,.,.,..,..,.,..,.,..,.,.,.,..,.,.,.,.,.,.,.,,..,..,.,.,.,.,.,.,.,.,.,,,.,.,.,.,.,.,.,.,.,.,.,.,..,.,.,..,.,..,.,..,.,.,..,.,.,.,.,..,.,., , .,.,.,. .,.,., ., . ,.,. . ,. . . , . , ., , , . ,. ..,.,,,.,.,.,.,.,.,.,.,..,.,.,.,.,,.,.,..,..,.,.,.,.,.,..,.,.,..,.,.,.,.,..,.,.,.,.,.,..,.,..,.,.,.,,..,.,.,.,..,.,.,.,.,.,..,,.