Yes. You should have copyright of the work in order to have it uploaded to EOLAS. For the most part, you will own the copyright to your work, but there may be a few exceptions.
Please see our guide on Copyright and Repositories for more information.
If you are still uncertain about the copyright of your work feel free to get in touch with us at eolas@etbi.ie. Please use your ETB, college or training centre email when contact EOLAS. Requests from Gmail, Hotmail, Yahoo and other email services will be rejected.