If I leave the quality of a video on "automatic", on a long video it will start at the highest, and every few minutes it will knock it down one step, until I'm seeing the video in in the lowest (144p).
If I set manually the quality to 1080p, for instance, it works fine on any video of any length.
My internet speed is good, so I don't think that's the problem (I attach an image)
Does anyone know what could be the reason for this? Is it something to do with my Wifi?