diff --git a/db/nosql/column/clickhouse/docs/courses.txt b/db/nosql/column/clickhouse/docs/courses.txt
index 9c94d2a05..b14f5923f 100644
--- a/db/nosql/column/clickhouse/docs/courses.txt
+++ b/db/nosql/column/clickhouse/docs/courses.txt
@@ -1,6 +1,18 @@
 2023
 Otus - ClickHouse for engeneers and DB architects of p8
     https://www.youtube.com/playlist?list=PLfnFOImnyWRVvsSzKlwXiUCNqFPyBC7SB
-    CH 1 - setting up and tuning 48:00 of 1:26:36
+    Zheleznoy - CH 1 - setting up and tuning 1:19:00 of 1:26:36
         https://www.youtube.com/watch?v=xKhXlhgUGKA
         ! 1:13:00 - !!! ch prod settings recommendations !!!
+        ! 1:24:00 - resources
+        !   https://presentations.clickhouse.com/2017-shad/index.html
+        ! Zatelepin
+        !   https://habr.com/ru/articles/509540/
+        !   https://www.youtube.com/watch?v=PLMSA_gDdyM
+        ! Kita
+        !   https://maksimkita.com/
+        !   https://habr.com/ru/companies/oleg-bunin/articles/726570/
+        !   https://www.youtube.com/watch?v=hFuTo76tizU
+        !   https://www.youtube.com/watch?v=KedCUDZE9N4
+        !   https://maksimkita.com/presentations/zero_cost_conf/hash_tables/c++_zero_cost_hash_tables.pdf
+        ! 1:25:00 - !!! 2 extra links about cfg
diff --git a/db/nosql/column/clickhouse/docs/presentations.txt b/db/nosql/column/clickhouse/docs/presentations.txt
index 4a252e23c..555172238 100644
--- a/db/nosql/column/clickhouse/docs/presentations.txt
+++ b/db/nosql/column/clickhouse/docs/presentations.txt
@@ -1,3 +1,6 @@
+https://presentations.clickhouse.com/
+    https://presentations.clickhouse.com/2017-shad/index.html
+
 2024
 Otus - Kafka and ClickHouse of 1:41:20
     https://www.youtube.com/watch?v=Jp1SEm4UU48
diff --git a/db/nosql/column/clickhouse/feature/internals.txt b/db/nosql/column/clickhouse/feature/internals.txt
index a0a9261fe..b94daab36 100644
--- a/db/nosql/column/clickhouse/feature/internals.txt
+++ b/db/nosql/column/clickhouse/feature/internals.txt
@@ -1,6 +1,9 @@
 https://clickhouse.com/docs/en/updating-data
 https://clickhouse.com/docs/en/guides/developer/lightweight-delete#lightweight-delete-internals
 
+Clickhouse - Internal Structure of p19
+https://www.youtube.com/playlist?list=PL0Z2YDlm0b3jsHXli7yll7CGHI9qyALmK
+
 mutations
 https://clickhouse.com/docs/en/sql-reference/statements/alter#mutations
     alter ... update|delete
diff --git a/db/sql/postgres/feature/performance/explain/docs/presentations.txt b/db/sql/postgres/feature/performance/explain/docs/presentations.txt
index 2d2abe4ed..d17971131 100644
--- a/db/sql/postgres/feature/performance/explain/docs/presentations.txt
+++ b/db/sql/postgres/feature/performance/explain/docs/presentations.txt
@@ -29,7 +29,7 @@ Tenzor - Backend School p4 - Query Analysis p1 9:00 of 1:24:11
     ! 1:09:00 - if Heap Fetches quite large, we made worse by this idx, compare to just "Index Scan"
     ! 1:13:00 - Foreign Scan - for tables on ext servers
 2021
-PGConf - Augustine - Deeper understanding of PG execution plan 26:00 of 47:55
+PGConf - Augustine - Deeper understanding of PG execution plan 34:00 of 47:55
     https://www.youtube.com/watch?v=Ls-uE1V31lE
     ! 4:00 - debug_print_parse(boolean) - https://www.postgresql.org/docs/current/runtime-config-logging.html#GUC-DEBUG-PRINT-PARSE
     !       https://postgrespro.ru/docs/postgrespro/current/runtime-config-logging#GUC-DEBUG-PRINT-PARSE
@@ -55,3 +55,7 @@ PGConf - Augustine - Deeper understanding of PG execution plan 26:00 of 47:55
     !   https://www.postgresql.org/docs/current/catalog-pg-rewrite.html
     !   https://dzone.com/articles/postgresql-rewrite-rules
     !   https://habr.com/ru/companies/first/articles/656673/
+    ! 31:00 - seq_page_cost, random_page_cost, cpu_tuple_cost, cpu_index_tuple_cost
+    !   void cost_seqscan(Path *path, ...)
+    !   create tablespace tbs1 LOCATION '/var/local/../tbs1' with (seq_page_cost=1, random_page_cost=1.1, effective_io_concurrency=2);
+    ! 33:00 - select hystogram_bounds from pg_stats where ...
diff --git a/nontech/intelligence/people/artamonov.txt b/nontech/intelligence/people/artamonov.txt
index 11a5e1f97..b7ac2dd3c 100644
--- a/nontech/intelligence/people/artamonov.txt
+++ b/nontech/intelligence/people/artamonov.txt
@@ -56,7 +56,7 @@ to-look
         vat 21
 
 2025
-UnionVeche - Dautov - Artamonov - Why Iran Thrown Asad 31:00 of 1:01:06
+UnionVeche - Dautov - Artamonov - Why Iran Thrown Asad 40:00 of 1:01:06
     https://www.youtube.com/watch?v=AX8mIEx1Is0
 2024
 Always - Petkus - Artamonov - Forgot killing Terrorists in Toilet 14:00 of 1:19:13
diff --git a/nontech/literature/ru/pushkin.txt b/nontech/literature/ru/pushkin.txt
index 79d922e84..4a7c20f55 100644
--- a/nontech/literature/ru/pushkin.txt
+++ b/nontech/literature/ru/pushkin.txt
@@ -1,7 +1,8 @@
 https://predanie.ru/Pushkin/
 
 2024
-NekrasovLib - Valyugin - Scientific Cat 2:00 of 1:29:22
+NekrasovLib - Valyugin - Scientific Cat 38:00 of 1:29:22
     https://www.youtube.com/watch?v=kRHJLroP3k8
+    ! 38:00 painter Valentin Dubinin
 SuchAWay - Gold Cock True Story of 29:00
     https://www.youtube.com/watch?v=5IKIc4tFoQc