We've noticed that some apps on the Android Play Store do not work over HDMI cable and so do not work on Android devices that display contents on an external screen such as a HDTV.
These apps, while working fine with our service, will return a random error when trying to watch them on an Android box that is connected to your HDTV.
Unfortunately for situations like this, the only way you'll be able to watch videos on the affected app is to watch them either on your tablet or mobile phone.
Just to reiterate, this issue does not stem from the SimpleTelly service, but is a restriction applied by the application developer themselves.
If you are not sure or have further queries, kindly contact us at firstname.lastname@example.org and we'll do our best to answer your queries.