I've used injectors for cs go, which hugely improves a video by keeping the deathnotices enabled for only a specific player, add outline to deathnotice etc,
although if you do use it without entering some launch settings, you can get banned since it works just like a hack.

Can someone with experience confirm that this is safe please, 
all i know right now is that it's a .vpk file which  just changes the gui.

will i need to open source up with -insecure, sv_lan 1 

All i pretty much wanna do is remove the radar when im recording,
cl_Drawhud 1 removes everything yes, but i will have no crosshair and deathnotice. 
All i want to show is the crosshair and deathnotice.

I'm familiar with the commands on hiding other hud/gui such as the chat, hidepanel all etc.