Original sentence: A global, science-oriented multimedia portal that specializes in online video streaming.Aims to support communication between scientists, scholars, researchers in industry, and professionals.Certificates are provided by the respective university on successful completion of a course.Educational courses with lectures, quizzes and exams provided by universities for free
Edited sentence: A global, science-oriented multimedia portal that specializes in online video streaming, which is used to support communication between scientists, scholars, researchers in industry, and professionals.Educational courses with lectures, quizzes and exams provided by coveted universities for free for which certificates are provided by the respective university on successful completion of a course