Model: OLED55BX3LB
WebOS ver: 5.6.0-1001 (jhericurl-jimna)
Viewing videos from https://Euroleague.tv was fine up to about one month ago. I do not know if there was an upgrade, but videos from that site cannot be played any longer on this tv.
From the same wifi network (home network) videos from that site play fine to a number of devices (Android phones, 2 win11 laptops, 1 win10 laptop).
Adjusted all browser settings (JavaScript, cookies), cleared cookies, cleared all browser data and history.
No updates available to download
Finally, reset to factory settings but still videos from https://euroleague.tv cannot be played on the tv set.