Iptables redirect doe not seem to work

[francus]

Fedora terminal:

[user@grab2 ~]$ sudo iptables -t nat -A OUTPUT -p tcp --dport 1935 -j REDIRECT
[user@grab2 ~]$ rtmpsrv
RTMP Server v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu; license: GPL

Streaming on rtmp://0.0.0.0:1935

But after that nothing happens even if I refresh the firefox tab here https://www.rt.com/on-air/rt-america-air/

Also I can see the video as usual on firefox, but this is not expected to work this way, I understand

same result with rtmpsuck