But you can still watch it in a higher quality.
With billions of people working from their homes due to the coronavirus threat, there is now a sudden increase of home internet users everywhere. Fearing the networks might be overloaded or too congested, most services like Netflix have started throttling speeds and streaming in lower resolutions to lessen network capacities.
YouTube also said that it is now defaulting to SD quality whenever you watch a video. YouTube uses adaptive streaming, where it increases or decreases the quality of the streaming video depending on how fast your connection is. But don’t worry, if you still want to watch in HD or 4K, you can always enable it manually in the settings.
YouTube initially rolled out default SD streaming the EU, United Kingdom, and Switzerland. It should be rolling out the changes to users around the world in the next couple of days.