How do I examine the video in iceweasle problem

[lina <lina.lastname@gmail.com>]

Hi,

when I tried to watch some video online, in iceweasle,

it's (naturally) silent in less than 2 mins, it can continue playing
but no sound. I can drag further but can play, just no sound.

I also tried epiphany, still the same problem.

also I changed to different video,

the same situation.

Thanks for any suggestions,


-- 
Best Regards,

lina