Resources

Re

What type of resources are allowed to upload? Is it allowed to put external link such as website or app where a student can views additional knowledge?

Thank you in advance to anyone who will answer my question.

AHardin

Here's the official Udemy support page on adding resources to lectures:
https://support.udemy.com/hc/en-us/articles/229604868-Adding-Resources-to-Lectures

Yes, you can link to external resources. If you're not sure if you can add a link to a particular website, for whatever reason such as private or copyrighted information, etc., you can always ask the Udemy Policy team.