The RPi people upgraded a fix for a bug a couple hours ago that was created from their last commit that affects our raspberrypi-bootloader packages.
This bug causes freezes and black screens when playing h264 video in web browser and video players.
I pushed the new packages to all branches and will be there when the mirrors sync.
raspberrypi-bootloader-20200601-1
raspberrypi-bootloader-x-20200601-1