diff --git a/server/szurubooru/func/mime.py b/server/szurubooru/func/mime.py
index 4aa9c3dc..f01af0da 100644
--- a/server/szurubooru/func/mime.py
+++ b/server/szurubooru/func/mime.py
@@ -39,7 +39,7 @@ def get_mime_type(content: bytes) -> str:
     if content[4:12] in (b"ftypisom", b"ftypiso5", b"ftypmp42", b"ftypM4V "):
         return "video/mp4"
 
-    if content[4:12] in (b"ftypqt  "):
+    if content[4:12] == b"ftypqt  ":
         return "video/quicktime"
 
     return "application/octet-stream"
@@ -69,7 +69,12 @@ def is_flash(mime_type: str) -> bool:
 
 
 def is_video(mime_type: str) -> bool:
-    return mime_type.lower() in ("application/ogg", "video/mp4", "video/quicktime", "video/webm")
+    return mime_type.lower() in (
+        "application/ogg",
+        "video/mp4",
+        "video/quicktime",
+        "video/webm",
+    )
 
 
 def is_image(mime_type: str) -> bool:
diff --git a/server/szurubooru/tests/assets/mov.mov b/server/szurubooru/tests/assets/mov.mov
new file mode 100644
index 00000000..911ee852
Binary files /dev/null and b/server/szurubooru/tests/assets/mov.mov differ
diff --git a/server/szurubooru/tests/func/test_mime.py b/server/szurubooru/tests/func/test_mime.py
index b33746b4..551ba7c3 100644
--- a/server/szurubooru/tests/func/test_mime.py
+++ b/server/szurubooru/tests/func/test_mime.py
@@ -7,6 +7,7 @@ from szurubooru.func import mime
     "input_path,expected_mime_type",
     [
         ("mp4.mp4", "video/mp4"),
+        ("mov.mov", "video/quicktime"),
         ("webm.webm", "video/webm"),
         ("flash.swf", "application/x-shockwave-flash"),
         ("png.png", "image/png"),
@@ -35,6 +36,7 @@ def test_get_mime_type_for_empty_file():
     [
         ("video/mp4", "mp4"),
         ("video/webm", "webm"),
+        ("video/quicktime", "mov"),
         ("application/x-shockwave-flash", "swf"),
         ("image/png", "png"),
         ("image/jpeg", "jpg"),
@@ -70,6 +72,8 @@ def test_is_flash(input_mime_type, expected_state):
         ("VIDEO/WEBM", True),
         ("video/mp4", True),
         ("VIDEO/MP4", True),
+        ("video/quicktime", True),
+        ("VIDEO/QUICKTIME", True),
         ("video/anything_else", False),
         ("application/ogg", True),
         ("not a video", False),