diff --git a/example.orchestration.yaml b/example.orchestration.yaml
index a040f5c..eee7e0f 100644
--- a/example.orchestration.yaml
+++ b/example.orchestration.yaml
@@ -18,7 +18,7 @@ steps:
     # - thumbnail_enricher
     # - wayback_archiver_enricher
     # - wacz_enricher
-    # - pdq_hash_enricher
+    # - pdq_hash_enricher # if you want to calculate hashes for thumbnails, include this after thumbnail_enricher
   formatter: html_formatter # defaults to mute_formatter
   storages:
     - local_storage
diff --git a/src/auto_archiver/archivers/twitter_archiver.py b/src/auto_archiver/archivers/twitter_archiver.py
index dfa9504..b99e0d8 100644
--- a/src/auto_archiver/archivers/twitter_archiver.py
+++ b/src/auto_archiver/archivers/twitter_archiver.py
@@ -6,6 +6,7 @@ from slugify import slugify
 
 from . import Archiver
 from ..core import Metadata, Media
+from ..utils.misc import remove_get_parameters
 
 
 class TwitterArchiver(Archiver):
@@ -133,7 +134,7 @@ class TwitterArchiver(Archiver):
             media = Media(filename="")
             media.set("src", u)
             ext = ""
-            if (mtype := mimetypes.guess_type(u)[0]):
+            if (mtype := mimetypes.guess_type(remove_get_parameters(u))[0]):
                 ext = mimetypes.guess_extension(mtype)
 
             media.filename = self.download_from_url(u, f'{slugify(url)}_{i}{ext}', item)
diff --git a/src/auto_archiver/utils/misc.py b/src/auto_archiver/utils/misc.py
index 22d5502..c96a39f 100644
--- a/src/auto_archiver/utils/misc.py
+++ b/src/auto_archiver/utils/misc.py
@@ -2,6 +2,7 @@
 import os, json, requests
 from datetime import datetime
 from loguru import logger
+from urllib.parse import urlparse, urlunparse
 
 
 def mkdir_if_not_exists(folder):
@@ -20,6 +21,13 @@ def expand_url(url):
             logger.error(f'Failed to expand url {url}')
     return url
 
+def remove_get_parameters(url):
+    # http://example.com/file.mp4?t=1 -> http://example.com/file.mp4
+    # useful for mimetypes to work
+    parsed_url = urlparse(url)
+    new_url = urlunparse(parsed_url._replace(query=''))
+    return new_url
+
 
 def getattr_or(o: object, prop: str, default=None):
     try: