before you begin,
start virtualdj and go to settings >> broadcast >> radio server
and save your radio settings (fill in a name next to Config: and hit the save icon)
then exit virtualdj

download these
  https://ocv.me/loopstream.exe
  https://ocv.me/loopstreamTraktor3.exe

keep them in the same folder (for example downloads)
then run loopstream.exe

select YES here:
  "Would you like me to perform the necessary changes to ... configuration files?"

select "Allow access" here:
  <Windows Security Alert>
  Name: traktor2loopstream.exe

open loopstream settings,
select NO here:
  <Loopstream for Dummies>
  wanna use the setup wizard?

inside loopstream settings,
  in the two dropdowns named "input Music" and "Local Output",
  select something that begins with "OK:"

  click the Tags tab,
  open the topmost dropdown menu (next to the Advanced button),
  select this:
    Traktor plugin

  click SAVE 4EVA

start virtualdj,
open settings >> broadcast >> radio server,
change Config: to Loopstream
press START BROADCAST

these settings should have been filled in automatically:
  protocol = icecast
  encoding quality = any mp3
  server url = 127.0.0.1
  server port = 42069
  mount address = utf.mp3
  login = source
  password = loopstream

open OBS,
add a new "Text (GDI+)" source,
[x] read from file,
C:/Users/noot/Downloads/LoopstreamTools/tags.txt

or, instead of using a Text source,
click Tagbox in Loopstream
and add a window capture in OBS
 (this will update 4 seconds faster)

protip:
  you can add a delay so the tags don't update immediately:
  in loopstream settings » tags » advanced,
  "debounce" is the delay in seconds
  
  but note that the tags must stay the same during the delay,
  otherwise they will be skipped, so for example if you have a
  delay of 10 sec and you keep switching songs faster than that,
  the tags will never change