The media feature pack is not supplied as part of the 2004 update rather than being a new install package that you have to find within the microsoft support and MSKB entries
For me - x64 win-10-Pro-N
You have to install the 2004 update, let it reboot, and finish integrating the installed changes into your working environment
Then use the Services facility -
add programs and features
wait for the GUI to populate the list (maybe several minutes)
Select the Optional features
wait for the GUI to populate the list (maybe several minutes)
Select the Add Optional features
wait for the GUI to populate the list (maybe several minutes)
select the feature and let it install (maybe a fluid management break)
Maybe a reboot
Then you should probably install the extra Codec's
For them - see the earlier 2019 update response
You will probably need to sign-in to your (or a) microsoft account associated with the (or a) windows licence ownership.
Maybe a reboot
.
I did get some help from their support staff, but they did not specifically tell me that the facility is in the Optional Features
I was guided to that, but the agent apparently did not know about waiting for the GUI to populate the list, so did not tell me to wait for the GUI to populate the entries, and until it completed that the options needed were not selectable.