Use Gemini to summarize YouTube videos

This sample demonstrates how to use Gemini to summarize YouTube videos.

Code sample

Go

Before trying this sample, follow the Go setup instructions in the Vertex AI quickstart using client libraries. For more information, see the Vertex AI Go API reference documentation.

To authenticate to Vertex AI, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 

import (
	"context"
	"fmt"
	"io"

	genai "google.golang.org/genai"
)

// generateWithYTVideo shows how to generate text using a YouTube video as input.
func generateWithYTVideo(w io.Writer) error {
	ctx := context.Background()

	client, err := genai.NewClient(ctx, &genai.ClientConfig{
		HTTPOptions: genai.HTTPOptions{APIVersion: "v1"},
	})
	if err != nil {
		return fmt.Errorf("failed to create genai client: %w", err)
	}

	modelName := "gemini-2.0-flash-001"
	contents := []*genai.Content{
		{Parts: []*genai.Part{
			{Text: "Write a short and engaging blog post based on this video."},
			{FileData: &genai.FileData{
				FileURI:  "https://www.youtube.com/watch?v=3KtWfp0UopM",
				MIMEType: "video/mp4",
			}},
		}},
	}

	resp, err := client.Models.GenerateContent(ctx, modelName, contents, nil)
	if err != nil {
		return fmt.Errorf("failed to generate content: %w", err)
	}

	respText, err := resp.Text()
	if err != nil {
		return fmt.Errorf("failed to convert model response to text: %w", err)
	}
	fmt.Fprintln(w, respText)

	// Example response:
	// Okay, here’s a short and engaging blog post based on the provided video.
	//
	// **Google's 25th: A Look Back at What We've Searched**
	// ...

	return nil
}

Python

Before trying this sample, follow the Python setup instructions in the Vertex AI quickstart using client libraries. For more information, see the Vertex AI Python API reference documentation.

To authenticate to Vertex AI, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 

from google import genai
from google.genai.types import HttpOptions, Part

client = genai.Client(http_options=HttpOptions(api_version="v1"))
model_id = "gemini-2.5-flash-preview-05-20"

response = client.models.generate_content(
    model=model_id,
    contents=[
        Part.from_uri(
            file_uri="https://www.youtube.com/watch?v=3KtWfp0UopM",
            mime_type="video/mp4",
        ),
        "Write a short and engaging blog post based on this video.",
    ],
)

print(response.text)
# Example response:
# Here's a short blog post based on the video provided:
#
# **Google Turns 25: A Quarter Century of Search!**
# ...

What's next

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