Hi again, joshl!

Thank you for the attention you give to this problem!

As I said, I watch local TV stations, and I am afraid that I shouldn't advertise this site's activities, because sometimes they have to remove streams following requests from content owners!

Anyway, when I posted my question I thought there was some simple setting that I had to change; if a special research has to be performed, I'd rather not waste your time!?

The plugins I have installed are standard, they are installed on the other browsers I mentioned; also, the Flash Player works fine on other video sites - YouTube, Vimeo, etc.

As I said, I thought that the message itself - "Manifest is not a valid M3U8..." would be enough to point to the nature of the problem!?

Hi, leocg!

I am afraid that "a link to the page" would not help - it's a site that streams local TV's, and it says explicitly that they are only accessible for viewers IN this (East European:) country!

Hi, joshl! I am not sure what you mean, but in the "About" section I see this:

About Opera
Version information
Version
12.17
Build
1863
Platform
Win32
System
Windows 7
Browser identification

Opera/9.80 (Windows NT 6.1) Presto/2.12.388 Version/12.17

On this same computer I can watch TV streams from a certain site in all other browsers (IE, Chrome, Firefox, Iron).
However, Opera always shows this message in the flash player box: "Manifest is not a valid M3U8..."
Any ideas what is wrong - with what!?