I've just realized that the style of the Featured Videos has been changed. There is no loading for the featured videos, the thumbnail has a heavily changed style, the video player has some modifications and the more videos screen has changed.
Also, can the autoplay be like 10 seconds instead of 3 for the featured videos?
Technical Updates doesn't have to cover every small detail, and companies usually announce major changes or bugs that affect the end user functionality, rather than backend changes.
I assume the details been left out because it has little impact or because it's still in development - videos still play as they have, and the changes and tweaks are ongoing (or may be different for different users).