Hello Imtiaz, I hope you are doing well.
- When you login at: https://rntlab.com/courses
- You can open the Arduino Course: https://rntlab.com/module-1/course-intro-arduino-projects/
You can download the eBook and use the left sidebar navigation to watch the online version of the course (including the videos). Does that work for you?
Thanks for your patience. Regards,