What muf4fun has stated is correct, but what also is strange, you can use a mobile phone in a windscreen cradle etc originally designed for Sat Nav ? Bu could be used for watching film etc. This is why Fixed Vehicle Equipment manufacturers have to comply with current Safety Regulations.
If you are caught using your Mobile for streaming videos you will be fined & you may not be insured in event of accident etc ?? So best practice is not to view any video in front driver & passenger area.