*/
    public List<SitemapVideo> getVideos() {
        if (videos == null) {
            videos = new ArrayList<>();
        }
        return videos;
    }

    /**
     * Adds a video to this sitemap URL.
     * @param video the video to add
     */
    public void addVideo(final SitemapVideo video) {
        getVideos().add(video);
    }

    /**

        final SitemapUrl sitemapUrl = (SitemapUrl) sitemaps[0];
        assertEquals("http://www.example.com/videos/sample.html", sitemapUrl.getLoc());
        assertEquals(1, sitemapUrl.getVideos().size());

        final SitemapVideo video = sitemapUrl.getVideos().get(0);
        assertEquals("http://www.example.com/thumbs/123.jpg", video.getThumbnailLoc());
        assertEquals("Sample video title", video.getTitle());