this is legal ?

Hello everyone,

I’d really like to know if this is legal:

-dev +mat_letterbox_aspect_goal 0 +mat_letterbox_aspect_threshold 0 +building_cubemaps "1" +exec autoexec -preload -novid -freq 200 +gfx_nvnUseLowLatency 1 -threads 4

I got banned and people are saying I’m a cheater.

I have nothing else — just this command that I took from YouTube.

Has anyone else been banned for this?

I’m asking because I’m clean.