

That is the smallest scale of self hosting. The server and the client are the same device. It is also the most insecure way as you probably don’t have any backups and very limited storage space.
Actually self hosting is the next step when you decide you want 5+ TB of data and have it automatically create backups. Digital storage media degrade pretty quickly and if you just have your movies on a hard drive in your computer, after 5-10 years you might start to lose quality or some files completely.


Not like the whole video goes from 1080p to 720p or something but single bits of the drive will fails over time. If that bit is part of your video file, one pixel of one frame will be the wrong color/black. If multiple bits close to each other fail you might get a video stutter. If even more fail your video player will not play the video at all (or just stop playing at the place of the errors).