diff --git a/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6733b0451d6be0065430b418.md b/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6733b0451d6be0065430b418.md
index 9f51508af5d..b67a5dc5f80 100644
--- a/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6733b0451d6be0065430b418.md
+++ b/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6733b0451d6be0065430b418.md
@@ -1,14 +1,16 @@
 ---
 id: 6733b0451d6be0065430b418
 title: What Is Functional Programming?
-challengeType: 19
-# videoId: nVAaxZ34khk
+challengeType: 11
+videoId: 5GhbJNf8wFg
 dashedName: what-is-functional-programming
 ---
 
 # --description--
 
-The video for this lecture isn't available yet, one will be available soon. Here is a transcript of the lecture for now:
+Watch the video and answer the questions below.
+
+# --transcript--
 
 Functional programming is about writing code that is clean, predictable, and easier to test and debug. Two key concepts we'll explore today are pure functions and avoiding side effects.
 
diff --git a/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6734061fe116df617a564a37.md b/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6734061fe116df617a564a37.md
index 06bc707e20b..3ca149d3893 100644
--- a/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6734061fe116df617a564a37.md
+++ b/curriculum/challenges/english/25-front-end-development/lecture-understanding-functional-programming/6734061fe116df617a564a37.md
@@ -1,14 +1,16 @@
 ---
 id: 6734061fe116df617a564a37
 title: What Is Currying, and How Does It Work?
-challengeType: 19
-# videoId: nVAaxZ34khk
+challengeType: 11
+videoId: N65U75mUL74
 dashedName: what-is-currying-and-how-does-it-work
 ---
 
 # --description--
 
-The video for this lecture isn't available yet, one will be available soon. Here is a transcript of the lecture for now:
+Watch the video and answer the questions below.
+
+# --transcript--
 
 Currying is a technique where we transform a function that takes multiple arguments into a sequence of functions, each taking a single argument.
 
diff --git a/curriculum/challenges/english/25-front-end-development/lecture-understanding-recursion-and-the-call-stack/6733b02d1e556005a544c5e3.md b/curriculum/challenges/english/25-front-end-development/lecture-understanding-recursion-and-the-call-stack/6733b02d1e556005a544c5e3.md
index 54ae17fe664..0829471b335 100644
--- a/curriculum/challenges/english/25-front-end-development/lecture-understanding-recursion-and-the-call-stack/6733b02d1e556005a544c5e3.md
+++ b/curriculum/challenges/english/25-front-end-development/lecture-understanding-recursion-and-the-call-stack/6733b02d1e556005a544c5e3.md
@@ -1,20 +1,24 @@
 ---
 id: 6733b02d1e556005a544c5e3
 title: What Is Recursion, and How Does It Work?
-challengeType: 19
-# videoId: nVAaxZ34khk
+challengeType: 11
+videoId: u2Z7fAAzbYc
 dashedName: what-is-recursion-and-how-does-it-work
 ---
 
 # --description--
 
-The video for this lecture isn't available yet, one will be available soon. Here is a transcript of the lecture for now:
+Watch the video and answer the questions below.
 
-Let’s learn how recursion works in JavaScript.
+# --transcript--
+
+What is recursion, and how does it work?
+
+Let's learn how recursion works in JavaScript.
 
 Recursion is a complicated feature that allows you to call a function repeatedly until a base-case is reached. Unlike a traditional loop, recursion allows you to handle something with an unknown depth, such as deeply nested objects/arrays, or a file tree. But you can also use it for more basic tasks, such as counting down from a given number.
 
-Let’s construct a function to do exactly that. We’ll call our function recursiveCountdown, and it needs to accept a number. We’ll have it print this number to the console:
+Let's construct a function to do exactly that. We’ll call our function `recursiveCountdown`, and it needs to accept a number. We’ll have it print this number to the console:
 
 ```js
 const recursiveCountdown = (number) => {