YouTube is testing a new colour progress bar: from red to pink

YouTube has started testing a new progress bar design that changes colour from red to pink as you get closer to the end of a video. This UI tweak has been spotted on both mobile devices and the web version of the platform. Some users, both with and without premium accounts, report that this feature started appearing about two months ago.

Here's What We Know

The new progress bar starts with the familiar red colour, which gradually changes to pink closer to the end of the video. While YouTube has not made an official statement about this change, users note that they are not using any extensions or add-ons that could cause this change.

why is my timeline turns pink near it end?
byu/InfoBot4000 inyoutube

Changing the colour of the progress bar could simply be a visual improvement aimed at creating a more pleasing user interface. The change from red to pink could symbolise the calm completion of a video. While many users have already noticed this change, it's still unclear if it will become available to everyone.

Source: Reddit