Unable to play on other devices

Does anyone have this issue of not being able to play videos on other ios devices despite being synced, once i’m not near my mac infuse doesnt play on my other devices, i thought the idea was i could play synced videos from my other devices because i don’t carry my mac about

Are your movies on your Mac? When you say synced do you mean downloaded or just that your library points to the mac? And when you are not near meaning still on same network but a different room, or something, or away from home?