diff --git a/nontech/mistery/misc.txt b/nontech/mistery/misc.txt
index 0f2af92a6..3c1c02064 100644
--- a/nontech/mistery/misc.txt
+++ b/nontech/mistery/misc.txt
@@ -5,7 +5,7 @@ https://search.rsl.ru/ru/record/01007504398
 http://history-fiction.ru/books/all_1/book_5250/
 
 2025
-Arhivarius - Message of 19 cent Writers 3:00 of 27:15
+Arhivarius - Message of 19 cent Writers 18:00 of 27:15
     https://www.youtube.com/watch?v=lwKVr6Wvvhs
 PictureOfTheWorld - Gordon Duff - About Real Power and Global Conspiracy 1:00 of 22:51
     https://www.youtube.com/watch?v=dru8zyC4pcY
diff --git a/nontech/ortho/people/mazhuko.txt b/nontech/ortho/people/mazhuko.txt
index 8e6b704ec..6bb2ba8da 100644
--- a/nontech/ortho/people/mazhuko.txt
+++ b/nontech/ortho/people/mazhuko.txt
@@ -29,6 +29,8 @@ people
     ! his students - S.S Averintsev, V Bibihin
 
 2025
+Mazhuko - Wife of 6-th Husband of 16:02
+    https://www.youtube.com/watch?v=L8TDmIm7AR4
 Mazhuko - Bogomyslie of Cross of 18:34
     https://www.youtube.com/watch?v=cpGW_-aNTk4
 Mazhuko - Father from Ours of 13:43
diff --git a/science/crypto/books.txt b/science/crypto/docs/books.txt
similarity index 100%
rename from science/crypto/books.txt
rename to science/crypto/docs/books.txt
diff --git a/science/crypto/docs/presentations.txt b/science/crypto/docs/presentations.txt
new file mode 100644
index 000000000..f4fc1fca5
--- /dev/null
+++ b/science/crypto/docs/presentations.txt
@@ -0,0 +1,3 @@
+2025
+Otus - DApp 0:00 of 1:49:13
+    https://www.youtube.com/watch?v=80oFiLvyaw8