Youtube videos can be uploaded by console with youtube data api v3. (they only let you upload 6 videos per day).
Manually 15 videos at a time can be uploaded on youtube through web application.
Is there any javascript code that will let me upload video from a folder and it will upload automatically all videos in my that folder. I will run that code on Browser's console tab or operating system (Node.js).
According to this answer, you could try to request a quota extension.
Searched on npm and found this among others.