Hi @Amjad882 One of the requirements is to have a total of 30 minutes of video divided into 5 sections (each course with a minimum of 5 or 6 minutes). Currently, you can't submit one video only.
Here are some great resources regarding course creation:
Let me know if you have any other questions!
Udemy Community Moderator
I may have read your question a little differently - are you asking how to upload all of your videos at once instead of one at a time? There's a "bulk upload" button in the course editor that lets you do exactly that. It can even import videos from Dropbox and other sources, upon which it will go off and process them all together. Once they are all processed, you can go through and assign videos to lectures without waiting for them to process as you go. See https://support.udemy.com/hc/en-us/articles/231537528-Using-the-Bulk-File-Uploader-