diff --git a/docs/integrations/block-integrations/multimedia.md b/docs/integrations/block-integrations/multimedia.md
index e2d11cfbf7..6b8f261346 100644
--- a/docs/integrations/block-integrations/multimedia.md
+++ b/docs/integrations/block-integrations/multimedia.md
@@ -12,7 +12,7 @@ Block to attach an audio file to a video file using moviepy.
 <!-- MANUAL: how_it_works -->
 This block combines a video file with an audio file using the moviepy library. The audio track is attached to the video, optionally with volume adjustment via the volume parameter (1.0 = original volume).
 
-Input files can be URLs, data URIs, or local paths. The output can be returned as either a file path or base64 data URI.
+Input files can be URLs, data URIs, or local paths. The output format is automatically determined: `workspace://` URLs in CoPilot, data URIs in graph executions.
 <!-- END MANUAL -->
 
 ### Inputs
@@ -22,7 +22,6 @@ Input files can be URLs, data URIs, or local paths. The output can be returned a
 | video_in | Video input (URL, data URI, or local path). | str (file) | Yes |
 | audio_in | Audio input (URL, data URI, or local path). | str (file) | Yes |
 | volume | Volume scale for the newly attached audio track (1.0 = original). | float | No |
-| output_return_type | Return the final output as a relative path or base64 data URI. | "file_path" \| "data_uri" | No |
 
 ### Outputs
 
@@ -51,7 +50,7 @@ Block to loop a video to a given duration or number of repeats.
 <!-- MANUAL: how_it_works -->
 This block extends a video by repeating it to reach a target duration or number of loops. Set duration to specify the total length in seconds, or use n_loops to repeat the video a specific number of times.
 
-The looped video is seamlessly concatenated and can be output as a file path or base64 data URI.
+The looped video is seamlessly concatenated. The output format is automatically determined: `workspace://` URLs in CoPilot, data URIs in graph executions.
 <!-- END MANUAL -->
 
 ### Inputs
@@ -61,7 +60,6 @@ The looped video is seamlessly concatenated and can be output as a file path or
 | video_in | The input video (can be a URL, data URI, or local path). | str (file) | Yes |
 | duration | Target duration (in seconds) to loop the video to. If omitted, defaults to no looping. | float | No |
 | n_loops | Number of times to repeat the video. If omitted, defaults to 1 (no repeat). | int | No |
-| output_return_type | How to return the output video. Either a relative path or base64 data URI. | "file_path" \| "data_uri" | No |
 
 ### Outputs