diff --git a/app/models/media_attachment.rb b/app/models/media_attachment.rb
index 88abd9339..984f4252a 100644
--- a/app/models/media_attachment.rb
+++ b/app/models/media_attachment.rb
@@ -100,6 +100,8 @@ class MediaAttachment < ApplicationRecord
       output: {
         'loglevel' => 'fatal',
         'preset' => 'veryfast',
+        'movflags' => 'faststart', # Move metadata to start of file so playback can begin before download finishes
+        'pix_fmt' => 'yuv420p', # Ensure color space for cross-browser compatibility
         'c:v' => 'h264',
         'c:a' => 'aac',
         'b:a' => '192k',