Disc-04 (Top Gun: Maverick) re-test 2026-05-11 surfaced a real-world
bdmt_eng.xml where <di:description> contained no prose, only nested
<di:thumbnail href="…"/> elements. The previous parser surfaced
the raw XML fragment as the description string ("<di:thumbnail
href=\"tgm_meta_sm.jpg\" />\\r\\n <di:thumbnail
href=\"tgm_meta_lg.jpg\" />"). Worse than no description.
Fix: filter description candidates that begin with `<` after
trimming. Real prose never starts with an angle bracket; XML-only
content always does. Net: title extraction unaffected (it uses its
own element-priority path); description field drops when it would
otherwise carry XML noise.
Two new bdmt tests, 12 of 12 passing.