@Test
    public void testAmazonTranscribeUnknownVideo_enUS() throws Exception {
        String expected = "Hi";
        String xml = getXML("en-US_(Hi).mp4", PARSER).xml;
        assertContains(expected, xml);
    }
Tests transcribe with a video file without passing in the source language.
The source language of the file is en-US (English - United States)
tika-parsers/tika-parsers-ml/tika-transcribe-aws/src/test/java/org/apache/tika/parser/transcribe/aws/AmazonTranscribeTest.java