diff --git a/redditbot.py b/redditbot.py
index 7bcda5e..2b72491 100644
--- a/redditbot.py
+++ b/redditbot.py
@@ -126,17 +126,21 @@ async def main():
                         break
                     file.write(chunk)
 
+    async def _get_file_mimetype(filename):
+        mimetype = mimetypes.guess_type(filename)[0]
+        if not mimetype:
+            proc = await asyncio.create_subprocess_exec('file', '--brief', '--mime-type', filename, stdout=asyncio.subprocess.PIPE)
+            stdout, _ = await proc.communicate()
+            mimetype = stdout.decode().strip()
+        return mimetype or ''
+
     async def _get_file_ext(filename):
         proc = await asyncio.create_subprocess_exec('file', '--brief', '--extension', filename, stdout=asyncio.subprocess.PIPE)
         stdout, _ = await proc.communicate()
         ext = stdout.decode().strip().split('/', maxsplit=1)[0]
         if not ext or ext == '???':
-            mimetype = mimetypes.guess_type(filename)[0]
-            if not mimetype:
-                proc = await asyncio.create_subprocess_exec('file', '--brief', '--mime-type', filename, stdout=asyncio.subprocess.PIPE)
-                stdout, _ = await proc.communicate()
-                mimetype = stdout.decode().strip()
-            ext = mimetypes.guess_extension(mimetype or '') or '.bin'
+            mimetype = await _get_file_mimetype(filename)
+            ext = mimetypes.guess_extension(mimetype) or '.bin'
         if not ext.startswith('.'):
             ext = '.' + ext
         return ext
@@ -225,10 +229,17 @@ async def main():
                             if i in preview:
                                 url = preview[i]['source']['url']
                                 break
-                    elif random_post.is_reddit_media_domain and preview and preview['enabled'] and not random_post.is_video:
-                        url = preview['images'][0]['source']['url']
                 if url:
                     await _download_file(filename, url)
+                    mimetype = await _get_file_mimetype(filename)
+                    if mimetype.startswith('image') and preview and preview['enabled']:
+                        preview = preview['images'][0]
+                        urls = [preview['source']['url']]
+                        urls.extend(reversed(i['url'] for i in preview['resolutions']))
+                        for url in urls:
+                            if os.path.getsize(filename) < 10000000:
+                                break
+                            await _download_file(filename, url)
                     ext = await _get_file_ext(filename)
                     if ext.startswith('.htm'):
                         files = []