If Al-Arabya wasn't credible, there wouldn't be 250 million Arabs who take their news from it, and I am one of them. While people who follow Press-TV, only do so to take the opposite of what it broadcast.
Millions of people watching news channel doesn't make it credible. Like that Qatari Bullsh*t broadcaster Al Jazeera.
Even in my own country India of over a billion people, most of the news channels are BS, yet people watch it. Doesn't make news channels any credible.