Hi,
Iperf details can be found here:
But being as the issue iptv, it may be worth checking the vero 4k+ with an internet speedtest, from the command line try this:
curl -s https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py | python -
I’d try it a few times, to see if you are getting consistent speeds. If the download speed is below 25mbit/s , you will struggle with iptv.
Thanks Tom.