Perhaps they're a developer working on a media player and need support for such files, which is a legitimate technical question. In that case, explaining technical aspects like codecs (Hindi audio, 480p resolution, Web-DL format) could be part of the answer. But given the source (Filmyfly.com), I need to be cautious. Also, Web-DL refers to a source that's extracted from a streaming service, which might be illegal if it's from pirated sites.