Webpage development - Need help in playing different videos

Need your help to develop web page to fulfill following requirements.

After opening webpage video1 should play automatically and be in loop continuously. -- this part is completed with the help of html There is separate button and input box in the webpage where user can enter number in input box and after clicking on button video2 should be played in loop based on value entered in input box. Basically video2 should get played in same window instead of video1. Once loop of video2 is complete then video1 should get resume.

Please suggest. I m new to web development. Demo piece of code will help. :)

Regards, Chetan