Hi,
Yes. There is a UA override which has been created a couple of months ago, ~10 months ago and released to Safari on a release on April 2024.
Steps to reproduce at the time:
0) Launch Safari
Open espn.com
Select Espn+ and log in
Select a show - eg Tryouts or OJ Made in America
Let stream start to play
Seek ahead or jump 10s forward
RESULTS:
Playback fails with error page from espn
At that time, the Chrome UA fixed the issue.
The WebKit team tried to contact ESPN/Disney without success. rdar://127140895
Let's work together on removing it. Let's open a bug on https://bugs.webkit.org/ for it. You can contact me directly there.
I opened https://bugs.webkit.org/show_bug.cgi?id=288247
Thanks for raising the issue.