diff --git a/videodb/editor.py b/videodb/editor.py
index 4c3ae25..5c40282 100644
--- a/videodb/editor.py
+++ b/videodb/editor.py
@@ -1,7 +1,14 @@
+import json
+import requests
+
 from typing import List, Optional, Union
 from enum import Enum
 
 from videodb._constants import ApiPath
+from videodb.exceptions import InvalidRequestError
+
+
+MAX_PAYLOAD_SIZE = 100 * 1024
 
 
 class AssetType(str, Enum):
@@ -349,7 +356,6 @@ class Font:
     :ivar int size: Font size in pixels
     :ivar str color: Font color in hex format (e.g., "#FFFFFF")
     :ivar float opacity: Font opacity (0.0 to 1.0)
-    :ivar int weight: (optional) Font weight (100 to 900)
     """
 
     def __init__(
@@ -358,7 +364,6 @@ def __init__(
         size: int = 48,
         color: str = "#FFFFFF",
         opacity: float = 1.0,
-        weight: Optional[int] = None,
     ):
         """Initialize a Font instance.
 
@@ -366,21 +371,17 @@ def __init__(
         :param int size: Font size in pixels (default: 48)
         :param str color: Font color in hex format (default: "#FFFFFF")
         :param float opacity: Font opacity between 0.0 and 1.0 (default: 1.0)
-        :param int weight: (optional) Font weight between 100 and 900
-        :raises ValueError: If size < 1, opacity not in [0.0, 1.0], or weight not in [100, 900]
+        :raises ValueError: If size < 1, opacity not in [0.0, 1.0]
         """
         if size < 1:
             raise ValueError("size must be at least 1")
         if not (0.0 <= opacity <= 1.0):
             raise ValueError("opacity must be between 0.0 and 1.0")
-        if weight is not None and not (100 <= weight <= 900):
-            raise ValueError("weight must be between 100 and 900")
 
         self.family = family
         self.size = size
         self.color = color
         self.opacity = opacity
-        self.weight = weight
 
     def to_json(self) -> dict:
         """Convert the font settings to a JSON-serializable dictionary.
@@ -394,8 +395,6 @@ def to_json(self) -> dict:
             "color": self.color,
             "opacity": self.opacity,
         }
-        if self.weight is not None:
-            data["weight"] = self.weight
         return data
 
 
@@ -1100,17 +1099,61 @@ def generate_stream(self) -> str:
         Makes an API request to render the timeline and generate streaming URLs.
         Updates the stream_url and player_url instance variables.
 
+        If the timeline data exceeds the max payload size, it will be uploaded
+        as a file first to avoid HTTP content length limits.
+
         :return: The stream URL of the generated video
         :rtype: str
         """
-        stream_data = self.connection.post(
-            path=ApiPath.editor,
-            data=self.to_json(),
-        )
+        timeline_data = self.to_json()
+        json_str = json.dumps(timeline_data)
+        payload_size = len(json_str.encode("utf-8"))
+
+        if payload_size > MAX_PAYLOAD_SIZE:
+            # Upload timeline data as a file to avoid HTTP content length limits
+            timeline_url = self._upload_timeline_data(json_str)
+            stream_data = self.connection.post(
+                path=ApiPath.editor,
+                data={"timeline_url": timeline_url},
+            )
+        else:
+            stream_data = self.connection.post(
+                path=ApiPath.editor,
+                data=timeline_data,
+            )
+
         self.stream_url = stream_data.get("stream_url")
         self.player_url = stream_data.get("player_url")
         return stream_data.get("stream_url", None)
 
+    def _upload_timeline_data(self, json_str: str) -> str:
+        """Upload timeline JSON data as a file and return the URL.
+
+        :param str json_str: The JSON string of timeline data to upload
+        :return: The URL of the uploaded file
+        :rtype: str
+        :raises InvalidRequestError: If upload fails
+        """
+        # Get a presigned upload URL
+        upload_url_data = self.connection.get(
+            path=f"{ApiPath.collection}/{self.connection.collection_id}/{ApiPath.upload_url}",
+            params={"name": "timeline_data.json"},
+        )
+        upload_url = upload_url_data.get("upload_url")
+
+        # Upload the JSON data as a file
+        try:
+            files = {"file": ("timeline_data.json", json_str, "application/json")}
+            response = requests.post(upload_url, files=files)
+            response.raise_for_status()
+        except requests.exceptions.RequestException as e:
+            raise InvalidRequestError(
+                f"Failed to upload timeline data: {str(e)}",
+                getattr(e, "response", None),
+            ) from None
+
+        return upload_url
+
     def download_stream(self, stream_url: str) -> dict:
         """Download a stream from the timeline.