continuous play (more then 3 tv episodes/ 3 movies

Hi
i want to know ho to set this up as when i watch a tv show it plays the first few episodes then stops i have spent many hours making play list after play list and its drive me crazy the list of devices will follow and they all seem to do the same, i have got 2x ready nas 104 both maxed out on hhd and just a high spec pc to be able to handle it all so if this can be looked at on the next updates that would be great

3x amazon 2nd gen sticks
2x nvdia shield (one 2015 and 2017 model)
2x roku 3’s
2x ps4’s
2x xbox1’s
1x roku 4k

Early 2021 clean-up: duplicate