It seems like you're mentioning "nippyfile" alongside "dod mp4," but I'm not entirely clear on the context. If you are looking for information or assistance related to a specific file format, file sharing, or something else related to "nippyfile" and "dod mp4," please provide more details. Are you trying to convert files, understand what they are, or something else? Let me know, and I'll be glad to help!