У вашего броузера проблема в совместимости с HTML5
This video includes questions related to the discoveries and inventions of different scientific instruments. It is the objective quiz with 4 options of which one is the correct option. You will get to think the correct option only for 15 sections. After 15 sections the buzzer sounds and next question appear. It targets to input the scientific facts in the player's mind. All the Best !!