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First, go to Livepeer Studio, if you haven’t already, and create an account. Once you’ve created an account, you’ll be able to create an API key by clicking on the “Create API Key” button on Developers page.
If you are planning on making API requests from the frontend in your application, we recommend creating a “CORS-enabled” API key. This is a limited, public API key which has a security model that allows for requests from the frontend.
Livepeer Studio - Create API key page
You can now use this API key in Livepeer SDKs and APIs in order to authenticate your requests and start building.
We recommend creating separate API keys for your development and production environments. This will allow you to easily manage your API keys and revoke them, if needed.
In this example, we will use the Livepeer React SDK to upload a video. Make sure to setup a react app first.

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Install the SDK

npm install @livepeer/react

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Set up the SDK

Next, create a new React client and wrap the app with LivepeerConfig. 
import { createReactClient, studioProvider } from "@livepeer/react";

const client = createReactClient({
  provider: studioProvider({ apiKey: "yourStudioApiKey" }),
});
Wrap the app with the LivepeerConfig component, passing the client to it 
import {
  LivepeerConfig,
  createReactClient,
  studioProvider,
} from "@livepeer/react";

const client = createReactClient({
  provider: studioProvider({ apiKey: "yourStudioApiKey" }),
});

function App() {
  return (
    <LivepeerConfig client={client}>
      <SomeComponent />
    </LivepeerConfig>
  );
}

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Upload a video

Now that our providers are set up, we set up file uploads with React Dropzone, a library for easily creating HTML5-compliant drag and drop zones for files (you can use another solution for file uploads): 
import { useCreateAsset } from "@livepeer/react";

import { useCallback, useState } from "react";
import { useDropzone } from "react-dropzone";

export const CreateAndViewAsset = () => {
  const [video, setVideo] = useState<File | undefined>();
  const {
    mutate: createAsset,
    data: asset,
    status,
    progress,
    error,
  } = useCreateAsset(
    video
      ? {
          sources: [{ name: video.name, file: video }] as const,
        }
      : null
  );

  const onDrop = useCallback(async (acceptedFiles: File[]) => {
    if (acceptedFiles && acceptedFiles.length > 0 && acceptedFiles?.[0]) {
      setVideo(acceptedFiles[0]);
    }
  }, []);

  const { getRootProps, getInputProps } = useDropzone({
    accept: {
      "video/*": ["*.mp4"],
    },
    maxFiles: 1,
    onDrop,
  });

  const progressFormatted = useMemo(
    () =>
      progress?.[0].phase === "failed"
        ? "Failed to process video."
        : progress?.[0].phase === "waiting"
        ? "Waiting"
        : progress?.[0].phase === "uploading"
        ? `Uploading: ${Math.round(progress?.[0]?.progress * 100)}%`
        : progress?.[0].phase === "processing"
        ? `Processing: ${Math.round(progress?.[0].progress * 100)}%`
        : null,
    [progress]
  );

  return (
    <>
      <div {...getRootProps()}>
        <input {...getInputProps()} />
        <p>Drag and drop or browse files</p>
      </div>

      {createError?.message && <p>{createError.message}</p>}

      {video ? <p>{video.name}</p> : <p>Select a video file to upload.</p>}
      {progressFormatted && <p>{progressFormatted}</p>}

      <button
        onClick={() => {
          createAsset?.();
        }}
        disabled={!createAsset || createStatus === "loading"}
      >
        Upload
      </button>
    </>
  );
};

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Play the asset

We can now use Player component from the SDK to play the asset: 
import { Player } from "@livepeer/react";

const playbackId = "f5eese9wwl88k4g8";

export const DemoPlayer = () => {
  return (
    <Player
      title="Waterfalls"
      playbackId={playbackId}
      showPipButton
      showTitle={false}
      aspectRatio="16to9"
      controls={{
        autohide: 3000,
      }}
      theme={{
        borderStyles: { containerBorderStyle: "hidden" },
        radii: { containerBorderRadius: "10px" },
      }}
    />
  );
};
Once the asset is upload, you will also receive a asset object in response. You can view the asset on Livepeer Studio:
Livepeer Studio - Stream page

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Start building

Check out the SDKs and API Reference pages to learn more about how to use the SDKs and API to build your application. You can also refer to the Guides section for more in-depth tutorials on how to use the SDKs and API to build specific applications. Don’t know where to start? Check out these four tutorials: