What is the CRTV in Silent Hill: Townfall?
A pocket television that Simon uses to tune into unstable signals. It takes the place of the series’ radio. PlayStation describes how it is used on PS5; the same for PC is Not found.

The four uses, keyed to the diagram
What the official copy says
“a pocket television used to tune into unstable signals”
The Steam page also says “The iconic SILENT HILL radio makes a comeback as the CRTV, a portable television device”. McKellan says the change was there from the very start: “In the earliest stages, it was a standard radio”. The team then set itself a challenge to make the radio an active tool rather than a passive one, by turning it into a visual device where you watch video signals as well as hear audio. Said in PlayStation.Blog: the developers on the Scottish setting
PS5 against PC
On PC, Steam lists full controller support and DualSense support, and that is the only cell that is not empty. Not found: whether the PC version reads a DualSense’s gyro or haptics for any of the four uses, and what keyboard-and-mouse controls do for tuning. What would change this: a Steam-side controls description. The stores are on the PS5 page and the Steam page. Listed on Steam store data (appdetails)
The look of it, and where to see it
The pre-order bonus is cosmetic: the PlayStation Store says the styles change the CRTV’s appearance. Which styles come with which store is on the pre-order bonus page. Listed on PlayStation Store (US) PlayStation’s Features Trailer, linked from the trailer page, is listed there as showing how the PS5 features are used.
Not found: what the letters CRTV stand for, in any store, publisher or studio text. The view it is played from is on the first-person page.