diff --git a/backend/src/api/disk-cache.ts b/backend/src/api/disk-cache.ts
index 2a53e7b9b..83d37fe3f 100644
--- a/backend/src/api/disk-cache.ts
+++ b/backend/src/api/disk-cache.ts
@@ -62,9 +62,24 @@ class DiskCache {
   }
 
   wipeCache() {
-    fs.unlinkSync(DiskCache.FILE_NAME);
+    logger.notice(`Wipping nodejs backend cache/cache*.json files`);
+    try {
+      fs.unlinkSync(DiskCache.FILE_NAME);
+    } catch (e: any) {
+      if (e?.code !== 'ENOENT') {
+        logger.err(`Cannot wipe cache file ${DiskCache.FILE_NAME}. Exception ${JSON.stringify(e)}`);
+      }
+    }
+
     for (let i = 1; i < DiskCache.CHUNK_FILES; i++) {
-      fs.unlinkSync(DiskCache.FILE_NAMES.replace('{number}', i.toString()));
+      const filename = DiskCache.FILE_NAMES.replace('{number}', i.toString());
+      try {
+        fs.unlinkSync(filename);
+      } catch (e: any) {
+        if (e?.code !== 'ENOENT') {
+          logger.err(`Cannot wipe cache file ${filename}. Exception ${JSON.stringify(e)}`);
+        }
+      }
     }
   }
 
diff --git a/backend/src/api/pools-parser.ts b/backend/src/api/pools-parser.ts
index 0f009cd1d..f17df385a 100644
--- a/backend/src/api/pools-parser.ts
+++ b/backend/src/api/pools-parser.ts
@@ -3,6 +3,7 @@ import logger from '../logger';
 import config from '../config';
 import PoolsRepository from '../repositories/PoolsRepository';
 import { PoolTag } from '../mempool.interfaces';
+import diskCache from './disk-cache';
 
 class PoolsParser {
   miningPools: any[] = [];
@@ -141,6 +142,10 @@ class PoolsParser {
       WHERE pool_id = ?`,
       [pool.id]
     );
+
+    // We also need to wipe the backend cache to make sure we don't serve blocks with
+    // the wrong mining pool (usually happen with unknown blocks)
+    diskCache.wipeCache();
   }
 
   private async $deleteUnknownBlocks(): Promise<void> {
@@ -151,6 +156,10 @@ class PoolsParser {
       WHERE pool_id = ? AND height >= 130635`,
       [unknownPool[0].id]
     );
+
+    // We also need to wipe the backend cache to make sure we don't serve blocks with
+    // the wrong mining pool (usually happen with unknown blocks)
+    diskCache.wipeCache();
   }
 }
 
diff --git a/frontend/.gitignore b/frontend/.gitignore
index 789881ddd..9c4b5d5e8 100644
--- a/frontend/.gitignore
+++ b/frontend/.gitignore
@@ -54,6 +54,7 @@ src/resources/assets-testnet.json
 src/resources/assets-testnet.minimal.json
 src/resources/pools.json
 src/resources/mining-pools/*
+src/resources/*.mp4
 
 # environment config
 mempool-frontend-config.json
diff --git a/frontend/src/app/components/about/about.component.scss b/frontend/src/app/components/about/about.component.scss
index 35df3fc46..2efd2f73b 100644
--- a/frontend/src/app/components/about/about.component.scss
+++ b/frontend/src/app/components/about/about.component.scss
@@ -36,6 +36,7 @@
 
   video {
     width: 640px;
+    height: 360px;
     max-width: 90%;
     margin-top: 0;
   }