My daughter likes watching things like Horrible Histories and SciShow Kids on her iPad so what we do is have her stream it on the TV so that it basically becomes the same as watching TV and we know exactly what she's doing. This way it also counts as her TV time and not her device time, which she prefers. It's also more sociable because I can sit on the couch with her and watch it together rather than huddling over a small screen.

Also... she recently taught me how to stream my phone on the TV so now I can watch stuff like The Basics On Transformers on the big telly!