> For the complete documentation index, see [llms.txt](https://docs.relevant-digital.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.relevant-digital.com/technical/integration/javascript-api/relevantdigital.loadvideourls.md).

# relevantDigital.loadVideoUrls()

Use `relevantDigital.loadVideoUrls()` to retrieve VAST XML URLs for instream video slots.

The function waits for the corresponding [relevantDigital.loadPrebid()](/technical/integration/javascript-api/relevantdigital.loadprebid.md) auction. It does not start an auction itself.

For a complete instream implementation, see [Instream video with HBM and GAM](/technical/integration/formats-and-channels/instream-video-with-hbm-and-gam.md).

### How it works

* You can call `loadVideoUrls()` before or after `loadPrebid()`.
* The callback runs only after the matching Prebid auction completes.
* For a single `loadPrebid()` call, only the first `loadVideoUrls()` call for the same slots completes.

{% hint style="info" %}
The VAST URLs returned by this API target Google Ad Manager.
{% endhint %}

### Parameters

#### `ids`

The IDs of `VideoSlot` objects created with [relevantDigital.defineVideoSlots()](/technical/integration/javascript-api/relevantdigital.definevideoslots.md). Use `videoSlot.getSlotElementId()` to retrieve a slot ID.

#### `cb(urls)`

The callback that receives VAST XML URLs. Pass these URLs to your video player.

#### `settings`

Optional settings.

**`onBuildVideoUrl`**

A callback that customizes the settings passed to [pbjs.adServers.gam.buildVideoUrl()](https://docs.prebid.org/dev-docs/publisher-api-reference/adServers.gam.buildVideoUrl.html). For Prebid.js versions before 10, it applies to [pbjs.adServers.dfp.buildVideoUrl()](https://docs.prebid.org/dev-docs/publisher-api-reference/adServers.dfp.buildVideoUrl.html).

### Example

```
window.relevantDigital = window.relevantDigital || {};
relevantDigital.cmd = relevantDigital.cmd || [];
relevantDigital.cmd.push(() => {
    const videoSlots = relevantDigital.defineVideoSlots([
        {
           path: '/12345/articles/pre_roll',
           id: 'preroll_1',
           custParams: { 'section': 'articles' },
        },
        {
           path: '/12345/articles/pre_roll',
           id: 'preroll_2',
           custParams: { 'section': 'articles' },
           },
    ]);
    

    // Call relevantDigital.loadPrebid() "as normal"
    relevantDigital.loadPrebid({ ... });
    
    // Get the URLs with VAST XML that should be used with the video player
    relevantDigital.loadVideoUrls(['preroll_1', 'preroll_2'], (vastUrls, datas) => {
       console.info('VAST URLs:', vastUrls);
       // TODO: Invoke video player here
    });
});
```

### Other ad servers

The returned `vastUrls` target Google Ad Manager. For another ad server, or for additional bid details, use the callback's `datas` parameter.

```
relevantDigital.loadVideoUrls(['preroll_1', 'preroll_2'], (vastUrls, datas) => {
    datas.forEach(({ unitData }) => {
         const highestBid = unitData.getHighestBid();
         if (highestBid) {
             console.info('Got bid for placement: ', unitData.slot.getAdUnitPath());
             console.info('Targeting key-values: ', highestBid.adserverTargeting);
             console.info('VAST URL: ', highestBid.vastUrl);
             console.info('VAST XML: ', highestBid.vastXml);

         } else {
             console.info('No bid for placement: ', unitData.slot.getAdUnitPath());
         }
    });
});
```

<br>


---

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