diff --git a/src/cot/video.rs b/src/cot/video.rs
index 9cb91f2..3c93b97 100644
--- a/src/cot/video.rs
+++ b/src/cot/video.rs
@@ -50,3 +50,80 @@ pub fn video_detail_xml(video_url: &str, uid: &str, callsign: &str) -> String {
         escape_xml_attribute(callsign),
     )
 }
+
+#[cfg(test)]
+mod tests {
+    use super::{escape_xml_attribute, parse_video_url, video_detail_xml};
+
+    #[test]
+    fn escapes_xml_attribute_characters() {
+        assert_eq!(
+            escape_xml_attribute("A&B\"<C>'"),
+            "A&amp;B&quot;&lt;C&gt;&apos;"
+        );
+    }
+
+    #[test]
+    fn parses_video_url_with_credentials_and_path() {
+        assert_eq!(
+            parse_video_url(" RTSP://user:pass@video.example.test:8554/live/main "),
+            Some((
+                "rtsp".to_string(),
+                "video.example.test".to_string(),
+                "8554".to_string(),
+                "/live/main".to_string(),
+            ))
+        );
+    }
+
+    #[test]
+    fn parses_video_url_without_path() {
+        assert_eq!(
+            parse_video_url("udp://239.1.1.1:1234"),
+            Some((
+                "udp".to_string(),
+                "239.1.1.1".to_string(),
+                "1234".to_string(),
+                String::new(),
+            ))
+        );
+    }
+
+    #[test]
+    fn rejects_malformed_video_urls() {
+        assert!(parse_video_url("video.example.test:8554/live").is_none());
+        assert!(parse_video_url("rtsp://video.example.test/live").is_none());
+        assert!(parse_video_url("://video.example.test:8554/live").is_none());
+        assert!(parse_video_url("rtsp://:8554/live").is_none());
+        assert!(parse_video_url("rtsp://video.example.test:/live").is_none());
+    }
+
+    #[test]
+    fn emits_empty_video_detail_for_blank_url() {
+        assert_eq!(video_detail_xml("   ", "uid", "callsign"), "<__video></__video>");
+    }
+
+    #[test]
+    fn falls_back_to_escaped_url_for_unstructured_input() {
+        assert_eq!(
+            video_detail_xml("custom&stream\"", "uid", "callsign"),
+            "<__video url=\"custom&amp;stream&quot;\"/>"
+        );
+    }
+
+    #[test]
+    fn emits_connection_entry_for_structured_video_url() {
+        let xml = video_detail_xml(
+            "RTSP://user:pass@video.example.test:8554/live?a=1&b=2",
+            "uas<&\"'",
+            "Falcon<&\"'",
+        );
+
+        assert!(xml.contains("protocol=\"rtsp\""));
+        assert!(xml.contains("address=\"video.example.test\""));
+        assert!(xml.contains("port=\"8554\""));
+        assert!(xml.contains("path=\"/live?a=1&amp;b=2\""));
+        assert!(xml.contains("uid=\"uas&lt;&amp;&quot;&apos;\""));
+        assert!(xml.contains("alias=\"Falcon&lt;&amp;&quot;&apos;\""));
+    }
+}