Chat with YouTube videos using .NET and C#

This is a sample demonstrating how to ingest a transcript for a YouTube video and ask questions about it using OpenAI, or local AI models, and .NET.

Running the sample

To run the sample:

Clone the app locally
Get an API key for OpenAI and set a local environment variable named OPENAI_API_KEY with that key
Run the project using your favorite editor, or calling dotnet run from a Terminal in the root of your project directory

You could also run this sample using a local AI model, downloaded using Ollama:

Install Ollama
Once installed, open a Terminal window and install the following models:

ollama pull llama3.2
ollama pull all-minilm

Run the project using your favorite editor, or calling dotnet run from a Terminal in the root of your project directory

Architectural details

This sample is built using the following technology:

.NET 9
Microsoft.Extensions.AI
The OpenAI library for .NET
OllamaSharp
A YouTubeTranscriptAPI package, which is a .NET implementation of the Python youtube-transcript-api module