Here are some updates on what various Wolfers are playing through on Youtube:
JohnLobo87 is currently playing through the original Spear of Destiny using the ECWolf engine. Apart from that, John is also doing a playthrough of the 2016 version of Doom, showing off some of the classic maps that can be found within the game.
LightningBoltForever completed a playthrough of Castle Totenkopf SDL.
RussianStormxLobo88 is playing through SoD Extreme II. She is also playing through other mods on and off, such as Project Weltgericht and Nocturnal: iLOW3D.
MrWolfForever is currently playing through Passage to Hollenteufel.
Lingyan203 isn't playing through any Wolf3D mods at the moment, but it usually won't be long before there is a new playthrough.
Kikoskia is doing a playthrough of the original Wolfenstein 3D, if you're feeling nostalgic! :)
KumanoMTG just finished a 100% playthrough of Operation Serpent. His next full walkthrough will be Coffee Break Pt. 2. He also did a video on level 5 of SoD Extreme II.
GarrettChan did a 100% playthrough of levels 5 and 13 of Sod Extreme II. He also plays various other games on his channel.
If I forgot to mention a channel currently doing a playthrough, please let me know in the comments.