Our DLNA solutions are for audio only. Youtube is tricky, but there are few workarounds that should work with DLNA. A „stream-what-you-hear“-App should do the trick. You can find many of those in the app stores, just make sure it supports DLNA. We will refrain from recommending one, as we have not had the time to test it ourselves. But please let us know what your experiences have been so far.