> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/get-started/faq/add-license-video.md).

# Add video license key

World's #1 PDF SDK Library for Web, Mobile, Server, Desktop

{% hint style="info" %}
**License Key Required**

The trial of Apryse SDK requires a trial license key, which is provided in the box titled "License Key". A commercial license key is required for use in a production environment. Please [contact sales](https://apryse.com/form/contact-sales) to purchase a commercial key or if you need any other license key assistance.
{% endhint %}

{% hint style="warning" %}
**Keep your license keys confidential.**

License keys are uniquely generated. Please make sure that it is not publicly available (e.g. in your public GitHub).
{% endhint %}

A watermark will be visible when no license key is entered and will be removed when you enter a valid license key.

## String option

Pass your license key as a string to the [`initializeVideoViewer`](https://sdk.apryse.com/api/video/module-@pdftron_webviewer-video.html#.initializeVideoViewer__anchor) function.

For example if your license key is

`key@domain.com///150:191:91:208:107:135:56:7:89:101:211:148:2:202:107...`

then you would call:

{% tabs %}
{% tab title="JavaScript" %}
{% code lineNumbers="true" %}

```js
WebViewer({
  path: '...'
}).then((instance) => {
  const {
      loadVideo,
  } = await initializeVideoViewer(
      instance,
      {
        license: `key@domain.com///150:191:91:208:107:135:56:7:89:101:211:148:2:202:107...`,
      }
  );
})
```

{% endcode %}
{% endtab %}
{% endtabs %}

Please make sure you’re using the entire key string, but with no extra whitespace included (i.e. at the end, which can happen when you copy/paste out of an email or the website)

## File option

Alternatively instead of passing a string, one can a pass a file url. The contents of the file should only be the entire license key.

{% tabs %}
{% tab title="JavaScript" %}
{% code lineNumbers="true" %}

```js
WebViewer({
  path: '...'
}).then((instance) => {
  const {
      loadVideo,
  } = await initializeVideoViewer(
      instance,
      {
        license: `/path/to/license.txt`
      }
  );
})
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

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