diff --git a/app/modules/yd_dl.py b/app/modules/yd_dl.py
index 195213f..345b03a 100644
--- a/app/modules/yd_dl.py
+++ b/app/modules/yd_dl.py
@@ -67,6 +67,7 @@ class YoutubeDLModule(niobot.Module):
             "merge_output_format": "webm/mp4/mov/m4a/oga/ogg/mp3/mka/mkv",
             "source_address": "0.0.0.0",
             "concurrent_fragment_downloads": 4,
+            "max_filesize": "600M"
         }
 
     async def convert_to_m4a(self, file: Path) -> Path:
@@ -249,6 +250,9 @@ class YoutubeDLModule(niobot.Module):
                         description += "\n"
                         description += "\n".join(lines)
 
+                if filesize and filesize >= 500 * 1000:
+                    return await response.edit("Sorry, could not find a format small enough.")
+
                 await response.edit(
                     f"# {title}\n\n{description}\n\nProgress: `0% [..........]`\n\nDownloading (step 2/10)"
                 )