Hi @jameshtx,
It sounds like you may be using the “sync to odrive” feature, which is a premium feature. “Sync to odrive” allows you to sync arbitrary folders that exists outside of the default odrive folder. Take a look at this post for more information on what is included in Premium and Free:
If you want to sync your videos, they would need to be created/copied inside the default odrive folder (in odrive/Amazon Cloud Drive/ for example).