diff --git a/backend/prisma/migrations/20260811151354_cascade_delete_video_relations/migration.sql b/backend/prisma/migrations/20260811151354_cascade_delete_video_relations/migration.sql
new file mode 100644
index 0000000..e197c0e
--- /dev/null
+++ b/backend/prisma/migrations/20260811151354_cascade_delete_video_relations/migration.sql
@@ -0,0 +1,23 @@
+-- DropForeignKey
+ALTER TABLE "BulkJobItem" DROP CONSTRAINT "BulkJobItem_videoId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "LintResult" DROP CONSTRAINT "LintResult_videoId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "VideoConfig" DROP CONSTRAINT "VideoConfig_videoId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "VideoPlaylist" DROP CONSTRAINT "VideoPlaylist_videoId_fkey";
+
+-- AddForeignKey
+ALTER TABLE "VideoConfig" ADD CONSTRAINT "VideoConfig_videoId_fkey" FOREIGN KEY ("videoId") REFERENCES "Video"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "LintResult" ADD CONSTRAINT "LintResult_videoId_fkey" FOREIGN KEY ("videoId") REFERENCES "Video"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "BulkJobItem" ADD CONSTRAINT "BulkJobItem_videoId_fkey" FOREIGN KEY ("videoId") REFERENCES "Video"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "VideoPlaylist" ADD CONSTRAINT "VideoPlaylist_videoId_fkey" FOREIGN KEY ("videoId") REFERENCES "Video"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/backend/prisma/schema.prisma b/backend/prisma/schema.prisma
index cdf0b52..b0467f0 100644
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -174,7 +174,7 @@ enum LintStatus {
 model VideoConfig {
   id              String    @id @default(cuid())
   videoId         String    @unique
-  video           Video     @relation(fields: [videoId], references: [id])
+  video           Video     @relation(fields: [videoId], references: [id], onDelete: Cascade)
   templateId      String?
   blockOrder      Json
   blockOverrides  Json
@@ -312,7 +312,7 @@ model SavedView {
 model LintResult {
   id            String       @id @default(cuid())
   videoId       String
-  video         Video        @relation(fields: [videoId], references: [id])
+  video         Video        @relation(fields: [videoId], references: [id], onDelete: Cascade)
   ruleCode      String
   severity      LintSeverity
   targetField   String?
@@ -369,7 +369,7 @@ model BulkJobItem {
   bulkJobId      String
   bulkJob        BulkJob  @relation(fields: [bulkJobId], references: [id])
   videoId        String
-  video          Video    @relation(fields: [videoId], references: [id])
+  video          Video    @relation(fields: [videoId], references: [id], onDelete: Cascade)
   beforeSnapshot Json?
   afterSnapshot  Json?
   status         String   @default("pending")
@@ -415,7 +415,7 @@ model VideoPlaylist {
   videoId    String
   playlistId String
   position   Int?
-  video      Video    @relation(fields: [videoId], references: [id])
+  video      Video    @relation(fields: [videoId], references: [id], onDelete: Cascade)
   playlist   Playlist @relation(fields: [playlistId], references: [id])
 
   @@id([videoId, playlistId])