LG WebOS doesn't play RTMP links, but you can use a little trick for this:
In the RTMP link, replace the RTMP:// to HTTP:// and put /playlist.m3u8 on the end of link
Ex: rtmp://ipaddress/stream is replaced by http://ipaddress/stream/playlist.m3u8
This convert the RTMP stream to HLS stream
I don't know if all RTMP works.