I can successfully pair youtube on my WD play and Ipad. However there is no such option on Dailymotion to pair or stream. Also there is no search functionality on Dailymotion app. How to use pair/stream/Search functionality on Dailymotion app? I can play only the videos that appears on dailymotion apps.
As a recommendation, set the unit back to factory defaults.
Check the link below on page 130 of the user manual for more detailes on how to do that.