@P-J Please keep reports on this thread about PS4 only. The video issue on IE11 is known and already in to be fixed. The scheduled maintenance was only addressing user account issues.
To everyone reporting the buffering on PS4 starting on Friday, March 30, 2018 - it seems like this issue was isolated to only the PS4 app as I have not seen any reports of it happening on the site or on the other apps. I have a meeting with customer support tomorrow to see if any support tickets were put in and what was done for each.
If you see this happen again and are able to access the website, please notify customer support using the contact us form. Even if you have reported this issue or one similar to it before, please still submit a report, so that development can be notified and can assess the severity of the issue.