diff --git a/curriculum/challenges/english/blocks/lab-html-audio-and-video-player/68de40f53fcaf106f51cc20f.md b/curriculum/challenges/english/blocks/lab-html-audio-and-video-player/68de40f53fcaf106f51cc20f.md
index d9c8388b2d5..b9c3224aec1 100644
--- a/curriculum/challenges/english/blocks/lab-html-audio-and-video-player/68de40f53fcaf106f51cc20f.md
+++ b/curriculum/challenges/english/blocks/lab-html-audio-and-video-player/68de40f53fcaf106f51cc20f.md
@@ -17,7 +17,7 @@ demoType: onClick
 3. Inside the first `section` element, you should have an `h2` element for the title of the video playing.
 4. Below the `h2` element, you should have a `video` element with `controls` and `width` attributes. The `width` attribute should be set to `640`.
 5. Inside the `video` element, you should have a `source` element with a `src` attribute pointing to a video file and a `type` attribute.
-   - You can use `https://cdn.freecodecamp.org/curriculum/labs/What is the map method and how does it work.mp4`.
+   - You can use `https://cdn.freecodecamp.org/curriculum/labs/what-is-the-map-method-and-how-does-it-work.mp4`.
 6. Inside the second `section` element, you should have an `h2` element for the title of the song playing.
 7. Below the `h2` element, you should have an `audio` element with the `controls` and `loop` attributes, and a `src` attribute that points to an audio file.
    - You can use `https://cdn.freecodecamp.org/curriculum/js-music-player/sailing-away.mp3`.
@@ -217,7 +217,7 @@ assert.match(srcAttr, /\.(mp3|wav|ogg|aac|flac)$/i);
     <section>
       <h2>What is the map method and how does it work</h2>
       <video controls width="640">
-        <source src="https://cdn.freecodecamp.org/curriculum/labs/What is the map method and how does it work.mp4" type="video/mp4" />
+        <source src="https://cdn.freecodecamp.org/curriculum/labs/what-is-the-map-method-and-how-does-it-work.mp4" type="video/mp4" />
       </video>
     </section>
 
diff --git a/curriculum/challenges/english/blocks/lab-multimedia-player/67fccc2463253b213a000142.md b/curriculum/challenges/english/blocks/lab-multimedia-player/67fccc2463253b213a000142.md
index ae8ae924e0d..2d41c7c4bfa 100644
--- a/curriculum/challenges/english/blocks/lab-multimedia-player/67fccc2463253b213a000142.md
+++ b/curriculum/challenges/english/blocks/lab-multimedia-player/67fccc2463253b213a000142.md
@@ -40,7 +40,7 @@ The `source` element can also be used in the `video` element like this:
 5. Inside the `audio` element, you should have a `source` element with a `src` attribute pointing to an audio file and a `type` attribute. You are free to use this audio URL if you like: `https://cdn.freecodecamp.org/curriculum/js-music-player/sailing-away.mp3`
 6. Inside the second `section` element, you should have an `h2` element for the title of the video playing.
 7. Below the `h2` element, you should have a `video` element with `controls`, `width` attributes and an `aria-label` attribute.
-8. Inside the `video` element, you should have a `source` element with a `src` attribute pointing to a video file and a `type` attribute. You are free to use this video URL if you like: `https://cdn.freecodecamp.org/curriculum/labs/What is the map method and how does it work.mp4`
+8. Inside the `video` element, you should have a `source` element with a `src` attribute pointing to a video file and a `type` attribute. You are free to use this video URL if you like: `https://cdn.freecodecamp.org/curriculum/labs/what-is-the-map-method-and-how-does-it-work.mp4`
 9. Below the `source` element, you should have a `track` element with a `src` attribute pointing to a subtitles file and a `kind` attribute, a `srclang` attribute and a `label` attribute.
 10. Inside the third `section` element, you should have an `h2` element for the title of the section eg. "Transcript".
 11. Below the `h2` element, you should have a `p` element with the transcript of the video.
@@ -323,7 +323,7 @@ assert.isAbove(transcript.textContent.trim().length, 0);
   <section>
     <h2>What is a map method and how does it work?</h2>
     <video controls width="600" aria-label="What is a map method and how does it work?">
-      <source src="https://cdn.freecodecamp.org/curriculum/labs/What is the map method and how does it work.mp4" type="video/mp4">
+      <source src="https://cdn.freecodecamp.org/curriculum/labs/what-is-the-map-method-and-how-does-it-work.mp4" type="video/mp4">
       
       <track 
       src="what-is-a-map-method.vtt" 
diff --git a/curriculum/challenges/english/blocks/lecture-accessible-media-elements/672a55eb7791559421ff0cd3.md b/curriculum/challenges/english/blocks/lecture-accessible-media-elements/672a55eb7791559421ff0cd3.md
index 612ef3f15a7..0c07ea51d1d 100644
--- a/curriculum/challenges/english/blocks/lecture-accessible-media-elements/672a55eb7791559421ff0cd3.md
+++ b/curriculum/challenges/english/blocks/lecture-accessible-media-elements/672a55eb7791559421ff0cd3.md
@@ -28,7 +28,7 @@ To add captions or subtitles to your video or audio content, you can use the `tr
   width="400"
   height="300"
   controls
-  src="https://cdn.freecodecamp.org/curriculum/labs/What is the map method and how does it work.mp4"
+  src="https://cdn.freecodecamp.org/curriculum/labs/what-is-the-map-method-and-how-does-it-work.mp4"
 >
   <track
     src="captions.vtt"