Probably bandwidth and client device power limitations. Maybe they are using an old tv with a jellyfin app so it doesn't support 4k video files / new codecs.
Some filament brands are more sensitive to moisture than others for example devil design PETG took 6 months to moisten ,but prusament did it in like two weeks.
Probably bandwidth and client device power limitations. Maybe they are using an old tv with a jellyfin app so it doesn't support 4k video files / new codecs.