On long trips my wife I would play movies for my daughter to keep her entertained so I created a holder for my phone (Samsung Note 8, tried it on my note 20 ultra and it also fits) to sit in and hook on the head rest posts of my car. Since this in a car i recommend printing in a heat resistant material such as PETG.
print 2 of the hooks, and you will need supports to print the holder
The author hasn't provided the model origin yet.