HTML course (Tamil) VIDEOs are unavailable (mentioned: private video)

This is my first visit to this website. I came to know about this platform via youtube. My intention to reach this platform to get a certificate and job. I am interested in colors and design so I preferred to learn HTML and CSS. I started with a free HTML Tamil course, but most of the videos in this course are unavailable. Please guide me to get those videos or if there is any steps that I have to take, please let me know.