diff --git a/db/nosql/mongo/docs/courses.txt b/db/nosql/mongo/docs/courses.txt
index 3a7ff278b..500e7a46b 100644
--- a/db/nosql/mongo/docs/courses.txt
+++ b/db/nosql/mongo/docs/courses.txt
@@ -1,3 +1,6 @@
+2023
+Simplilearn -  MongoDB Full Course 2023 0:00 of 7:50:16
+    https://www.youtube.com/watch?v=8eJJe4Slnik
 2022
 Mongo DB Deep Dive
     https://tutsnode.net/mongodb-deep-dive/
diff --git a/nontech/politics/tv/day/people/fefelov.txt b/nontech/politics/tv/day/people/fefelov.txt
index a75d9fb71..35005dce2 100644
--- a/nontech/politics/tv/day/people/fefelov.txt
+++ b/nontech/politics/tv/day/people/fefelov.txt
@@ -2,6 +2,8 @@ Andrey Alexandrovich
 glavred
 
 2023
+DayTV - Fefelov - Canal Will Never be the Same ru of 39:01
+    https://www.youtube.com/watch?v=kcwhSUFucGY
 DayTV - Shishkin - Fefelov - Plat A Faild - How to Exit from World Crisi of 44:49
     https://www.youtube.com/watch?v=tsfTrzhVUcU
 DayTV - Fefelov - Cheburashka Article of 11:00
diff --git a/ortho/people/mazhuko.txt b/ortho/people/mazhuko.txt
index 161ad94a6..e0a6ecb53 100644
--- a/ortho/people/mazhuko.txt
+++ b/ortho/people/mazhuko.txt
@@ -12,6 +12,8 @@ monastyr history
 https://www.youtube.com/watch?v=4WViVURDHcw
 
 2023
+Mazhukov - Last Hope of 11:15
+    https://www.youtube.com/watch?v=2QQ_sWmONQM
 Mazhuko - Main Business of Christianin of 17:18
     https://www.youtube.com/watch?v=CzLBQUee05M
 Mazhuko - How not to get II of 10:48
diff --git a/os/linux/nixos/docs/resources/chris-mcdonough.txt b/os/linux/nixos/docs/resources/chris-mcdonough.txt
new file mode 100644
index 000000000..46ef7c3a0
--- /dev/null
+++ b/os/linux/nixos/docs/resources/chris-mcdonough.txt
@@ -0,0 +1,2 @@
+2023
+https://www.youtube.com/playlist?list=PLa01scHy0YEnsvjvMNNk-JSvTdL_ivsml
diff --git a/os/linux/nixos/docs/resources/vimjoyer.txt b/os/linux/nixos/docs/resources/vimjoyer.txt
new file mode 100644
index 000000000..1b2a992ea
--- /dev/null
+++ b/os/linux/nixos/docs/resources/vimjoyer.txt
@@ -0,0 +1,2 @@
+2023
+https://www.youtube.com/playlist?list=PLko9chwSoP-15ZtZxu64k_CuTzXrFpxPE
diff --git a/os/linux/nixos/features/el/func/derivation/docs/presentations.txt b/os/linux/nixos/features/el/func/derivation/docs/presentations.txt
new file mode 100644
index 000000000..7dcb4a70d
--- /dev/null
+++ b/os/linux/nixos/features/el/func/derivation/docs/presentations.txt
@@ -0,0 +1,5 @@
+2023
+Vimjoyer - Nix derivations explained of 6:08
+    https://www.youtube.com/watch?v=WT75jfETWRg
+    nix edit ...
+    https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/make-derivation.nix