LGR is a fun YouTube channel focusing on retro PC hardware and esoterica and from time to time reviews classic games such as this recent review of Doom 3. LGR focuses on the Doom 3 original retail release, which is my personal favorite too(flashlight mechanics >).

One thing LGR highlights if you are looking into jumping back in to Doom 3 PC retail on Steam or using your original install discs is the Dewm 3 source port that takes the iD Software Doom 3 source and adds updated resolutions for modern displays. The original Doom 3 release is stuck in 4x3 aspect ratios and this source port / mod really gives the original Doom 3 retail the love that the BFG brought while keeping the original release prime.

https://dhewm3.org/