The introduction of digital signal was to solve the problem of line noise and interference... RF choking digital signal lines plays on old school notions that it helps somehow and cable/wire companies pray on that to make extra money from "high quality" lines that are completely redundant.
Digital (HDMI) is pass or fail... It works or it doesn't work... It doesn't get better with a filter.
Chokes have their place on power cords (stop RF from leaking out) and antenna wires (choke RF before reciever) and analog audio (eliminate RF line noise) but digital cords don't see the same benefits.
I could go on and on about the ripoff of expensive "high speed" HDMI cables but that's a whole nuther subject.