diff --git a/net/webserver/nginx/docs/presentations.txt b/net/webserver/nginx/docs/presentations.txt
index 33f1b6f27..d4b34eb08 100644
--- a/net/webserver/nginx/docs/presentations.txt
+++ b/net/webserver/nginx/docs/presentations.txt
@@ -1,6 +1,7 @@
 2025
 ArtemShumeiko - Nginx in Clear Words on Clean Sample ru of 27:43
     https://www.youtube.com/watch?v=2aoOEnZmCmQ
+    ! 19:00 upstream, server sample
 2024
 Rebrain - Tuning 0:00 of 2:25:37
     https://www.youtube.com/watch?v=qvrahqNLWwk
diff --git a/science/ai/rag/docs/presentations.txt b/science/ai/rag/docs/presentations.txt
index 50350aa7e..ea7e0a4fe 100644
--- a/science/ai/rag/docs/presentations.txt
+++ b/science/ai/rag/docs/presentations.txt
@@ -1,4 +1,6 @@
 2025
+Simplilearn - Multimodal RAG: Chat With Text, Images And Videos | Multimodal RAG Project 0:00 of 1:37:17
+    https://www.youtube.com/watch?v=iM4F2EILSWU
 ShVM - RAG for Dummies ru of 19:39
     https://www.youtube.com/watch?v=_CZEDMz5lkQ
     https://t.me/shvmxyz