diff --git a/README.md b/README.md
index 9931058..6348cf3 100755
--- a/README.md
+++ b/README.md
@@ -151,7 +151,7 @@ Table of Contents
 - [Programming and Data structures (PDS) - IIT Madras](https://nptel.ac.in/courses/106106130/)
 - [COP 5536 Advanced Data Structures, Prof Sahni - UFL](http://www.cise.ufl.edu/~sahni/cop5536/index.html) ([Videos](http://www.cise.ufl.edu/academics/courses/preview/cop5536sahni/))
 - [CS 261 - A Second Course in Algorithms, Stanford University](http://theory.stanford.edu/~tim/w16/w16.html) ([Youtube](https://www.youtube.com/playlist?list=PLEGCF-WLh2RJh2yDxlJJjnKswWdoO8gAc))
-- [CS 224 - Advanced Algorithms, Harvard University](http://people.seas.harvard.edu/~minilek/cs224/fall14/index.html) ([Lecture Videos](http://people.seas.harvard.edu/~minilek/cs224/fall14/lec.html)) ([Youtube](https://www.youtube.com/playlist?list=PL2SOU6wwxB0uP4rJgf5ayhHWgw7akUWSf))
+- [CS 224 - Advanced Algorithms, Harvard University](https://people.seas.harvard.edu/~cs224/fall14/index.html) ([Lecture Videos](https://people.seas.harvard.edu/~cs224/fall14/lec.html)) ([Youtube](https://www.youtube.com/playlist?list=PL2SOU6wwxB0uP4rJgf5ayhHWgw7akUWSf))
 - [CS 6150 - Advanced Algorithms (Fall 2016), University of Utah](https://www.youtube.com/playlist?list=PLbuogVdPnkCp8X9FHOglnLqFjyvqGLftx)
 - [CS 6150 - Advanced Algorithms (Fall 2017), University of Utah](https://www.youtube.com/playlist?list=PLbuogVdPnkCqS9Z419eky9m6gJP7zfhO9)
 - [ECS 222A - Graduate Level Algorithm Design and Analysis, UC Davis](http://web.cs.ucdavis.edu/~gusfield/cs222f07/videolist.html)
@@ -302,7 +302,7 @@ Table of Contents
 - [6.830/6.814 - Database Systems Fall 2014](https://www.youtube.com/playlist?list=PLfciLKR3SgqOxCy1TIXXyfTqKzX2enDjK)
 - [Informatics 1 - Data & Analysis 2014/15- University of Edinburgh](http://groups.inf.ed.ac.uk/vision/VIDEO/2014/da.htm)
 - [Database Management Systems, Aduni](http://aduni.org/courses/databases/index.php?view=cw)
-- [D4M - Signal Processing on Databases](https://ocw.mit.edu/resources/res-ll-005-d4m-signal-processing-on-databases-fall-2012/)
+- [D4M - Signal Processing on Databases](https://dspace.mit.edu/handle/1721.1/126284)
 - [In-Memory Data Management (2013)Prof. Hasso Plattner - HPI](https://open.hpi.de/courses/imdb2013/items/72j6pftms3dOSunM98JhfW)
 - [Distributed Data Management (WT 2019/20) - Dr. Thorsten Papenbrock - HPI](https://www.tele-task.de/series/1285/)
 - [CS122d - NoSQL Data Management (Spring 21) - Prof. Mike Carey - UC Irvine](https://uci.yuja.com/V/PlayList?node=9933576&a=1583628376&autoplay=1)
@@ -704,7 +704,7 @@ Table of Contents
   - [CS 492(C) Diffusion and Flow Models - Fall 2025 - KAIST](https://diffusion.kaist.ac.kr/) ([YouTube](https://www.youtube.com/playlist?list=PLyi5FHzX7hBzC698EjqgxQJG7pNPQyYyc))
   - [Stanford CS336 Language Modeling from Scratch I 2025 - Stanford](https://www.youtube.com/playlist?list=PLoROMvodv4rOY23Y0BoGoBGgQ1zmU_MT_) ([2026](https://www.youtube.com/playlist?list=PLoROMvodv4rMqXOcazWaTUHhq-yembLCV))
   - [Stanford CME295 Transformers & LLMs - Autumn 2025 - Stanford](https://www.youtube.com/playlist?list=PLoROMvodv4rObv1FMizXqumgVVdzX4_05)
-  - [Stanford CME296: Diffusion & Large Vision Models](https://www.youtube.com/pla()ylist?list=PLoROMvodv4rNdy8rt2rZ4T2xM0OjADnfu)
+  - [Stanford CME296: Diffusion & Large Vision Models](https://www.youtube.com/playlist?list=PLoROMvodv4rNdy8rt2rZ4T2xM0OjADnfu)
   - [Introduction to large language models - IIT Madras](https://www.youtube.com/playlist?list=PLZ2ps__7DhBbaMNZoyW2Hizl8DG6ikkjo)
   - [Build a Large Language Model (From Scratch) by Sebastian Raschka](https://www.youtube.com/playlist?list=PLTKMiZHVd_2IIEsoJrWACkIxLRdfMlw11)
   - [Reinforcement Learning of Large Language Models - UCLA](https://www.youtube.com/playlist?list=PLir0BWtR5vRp5dqaouyMU-oTSzaU5LK9r)