Hi, I'm Mr.med. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.
I'm sorry about the issue, Please download iSkysoft from https://www.iskysoft.com/dvd-creator-mac.html
You can simply open the app drag and drop the videos you want to burn , select DVD menu or edit videos, and then click "Burn" to start burning DVD.
Let me know the results
Has everything worked out, do you still need help ?
Let me know if you need further help