I’ve been working on fairly large scale broadcast television back-end systems which have been using 10/25/100G SMPTE 2110 IP for video flows instead of HD-SDI,

I’ve been working on fairly large scale broadcast television back-end systems which have been using 10/25/100G SMPTE 2110 IP for video flows instead of HD-SDI, and those have been timed with PTP for a while (SMPTE 2059-2 standard, which is a PTP profile). The GPS locked master clocks are custom hardware (ex: https://evertz.com/products/5700MSC-IP https://evertz.com/products/5700MSC-IP), but a lot of the edge devices like the video playout servers are standard X86 hardware with Ubuntu Linux, with PTP delivered in-band over the 10G/25G ports to the device (same link as the video/audio flows). (… Which I realize is not as accurate as the newer White Rabbit related PTP update you refer to - but still odd that the original article referenced NTP and not even regular PTP which has been in use for a while and seems pretty close to their claims even before the more recent enhancements)