How to find public channel videos?

You can see all the public videos through "Browse" - "Videos". Pick the ones you like and you can also follow the uploaders to view more videos and even the courses they have launched.

How can I create my channel?

You can upload a video from your dashboard under "My Channel" - "Create Video" by simply filling out the name and description of the video and copying the link of your public video uploaded in YouTube/Vimeo.