Can you make an boolean options to able to choose first "enclosure"?

[iRYO400]

Hi, thanks for the lib, saved a lot of hours for me.
I've found that the library chooses last "enclosure" for preview. Here is example item from RSS, but mostly first enclosure contains image and last the video. Thanks

<item>
        <title><![CDATA[Valve анонсировала двух персонажей для Dota 2]]></title>
        <link>https://dtf.ru/9202-valve-anonsirovala-dvuh-personazhey-dlya-dota-2?from=rss</link>
        <description><![CDATA[Грядущее обновление получило название Dueling Fates.]]></description>        <dc:creator><![CDATA[Никита Лосев]]></dc:creator>        <pubDate>Sat, 12 Aug 2017 15:07:16 +0300</pubDate>
        <guid isPermaLink="false">9202</guid>        <enclosure url="https://leonardo.osnova.io/b5cfe076-3fa7-399b-8491-08adfd607359/" type="image/jpeg"/><enclosure url="https://youtu.be/LV1ZV_DG3kI" type="video/x-ms-asf"/>    </item>
    <item>