Hi @bline, I hope you're doing well!
Keep in mind that, some devices allow you to install the Dropbox mobile app so you can preview files on your account via the TV itself. In some cases, you may need a third-party app in order to do so.
However, since I am not familiar with the specific product you mentioned, I'll leave this thread open for other users to contribute their suggestions.
Have a lovely weekend ahead,enjoy!