diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-b.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-b.english.md
index bc0b1d2204..8bd771880f 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-b.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-b.english.md
@@ -3,6 +3,7 @@ id: 5e6a54af58d3af90110a60a1
 title: Introduction B
 challengeType: 11
 isRequired: true
+videoId: H6qtjRTfSog
 ---
 
 ## Description
diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-c.english.md b/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-c.english.md
index a5809b386a..3db28d569c 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-c.english.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/lectures-python-for-everybody/introduction-c.english.md
@@ -3,6 +3,7 @@ id: 5e6a54ba58d3af90110a60a2
 title: Introduction C
 challengeType: 11
 isRequired: true
+videoId: 0QeGbZNS_bY
 ---
 
 ## Description
diff --git a/curriculum/schema/challengeSchema.js b/curriculum/schema/challengeSchema.js
index f5136ed075..e4f4d3e218 100644
--- a/curriculum/schema/challengeSchema.js
+++ b/curriculum/schema/challengeSchema.js
@@ -41,7 +41,6 @@ function getSchemaForLang(lang) {
     ),
     guideUrl: Joi.string().uri({ scheme: 'https' }),
     videoUrl: Joi.string().allow(''),
-    videoId: Joi.string(),
     forumTopicId: Joi.number(),
     helpRoom: Joi.string(),
     id: Joi.objectId().required(),
@@ -54,6 +53,10 @@ function getSchemaForLang(lang) {
     name: Joi.string(),
     order: Joi.number(),
     // video challenges only:
+    videoId: Joi.when('challengeType', {
+      is: challengeTypes.video,
+      then: Joi.string().required()
+    }),
     question: Joi.object().keys({
       text: Joi.string().required(),
       answers: Joi.array()