diff --git a/migrations/100_migrate_missing_cw_blocks.php b/migrations/100_migrate_missing_cw_blocks.php
new file mode 100644
index 00000000..3eda0dca
--- /dev/null
+++ b/migrations/100_migrate_missing_cw_blocks.php
@@ -0,0 +1,71 @@
+<?php
+class MigrateMissingCwBlocks extends Migration
+{
+    public function description()
+    {
+        return 'Fix payload of cw blocks and migrate blocks to oc_video_cw_blocks';
+    }
+
+    public function up()
+    {
+        $db = DBManager::get();
+
+        // Database statements
+        $update_payload_stmt = $db->prepare('UPDATE cw_blocks
+            SET payload = :payload
+            WHERE id = :id');
+
+        $token_stmt = $db->prepare('SELECT token FROM oc_video WHERE episode = ?');
+
+        $range_stmt = $db->prepare('SELECT DISTINCT range_id, range_type
+            FROM cw_structural_elements
+            INNER JOIN cw_containers ON (cw_containers.structural_element_id = cw_structural_elements.id)
+            INNER JOIN cw_blocks ON (cw_blocks.container_id = cw_containers.id AND cw_blocks.id = ?)
+        ');
+
+        $insert_block_stmt = $db->prepare('INSERT IGNORE INTO `oc_video_cw_blocks` (token, block_id, seminar_id)
+                VALUES (:token, :block_id, :seminar_id)');
+
+        $blocks = $db->query("SELECT id, payload FROM cw_blocks
+            WHERE block_type = 'plugin-opencast-video'");
+
+        // Iterate over all opencast blocks
+        while ($block = $blocks->fetch(PDO::FETCH_ASSOC)) {
+            $payload = json_decode($block['payload'], true);
+
+            // Set token in payload if token hasn't been migrated
+            if (isset($payload['episode_id']) && !isset($payload['token'])) {
+                $token_stmt->execute([$payload['episode_id']]);
+                $token = $token_stmt->fetchColumn();
+
+                if ($token) {
+                    $payload['token'] = $token;
+                    unset($payload['episode_id']);
+
+                    $update_payload_stmt->execute([
+                        ':payload' => json_encode($payload),
+                        ':id'      => $block['id']
+                    ]);
+                }
+            }
+
+            // Get seminar id of block
+            $range_stmt->execute([$block['id']]);
+            $range = $range_stmt->fetch(PDO::FETCH_ASSOC);
+
+            if ($range['range_type'] === 'course' && isset($payload['token'])) {
+                // Insert row to oc_video_cw_blocks and ignore if exists
+                $insert_block_stmt->execute([
+                    'token'      => $payload['token'],
+                    'block_id'   => $block['id'],
+                    'seminar_id' => $range['range_id'],
+                ]);
+            }
+        }
+    }
+
+    public function down()
+    {
+
+    }
+}
\ No newline at end of file