In the latest Safari Technology Preview 139 - 15.4, the VideoElement's getStartDate function is returning a time 1000x times too big (using microseconds when it used to be milliseconds?) e.g. 1644405911040000 (Thu Feb 23 54079 19:44:00 GMT+0000 (GMT)).
<rdar://problem/88786989>
Created attachment 451939 [details] [fast-cq] Patch
Committed r289762 (247234@main): <https://commits.webkit.org/247234@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 451939 [details].