It is possible that this is a typo, a highly obscure or proprietary file naming convention, or a randomly generated string of characters. Here is a brief analysis of potential interpretations:
If you can provide the where you saw "DSmowmp4"—such as a file extension , a string within a program , or a web search —I can better investigate what it might be. DSmowmp4
It could be a specific, proprietary filename generated by a niche piece of software or an internal system, often seen in custom data exports. Recommendations for Further Investigation: It is possible that this is a typo,
Where did this file or term come from? (Email attachment, downloaded from a specific website, generated by a program?) downloaded from a specific website
Is this a file on a computer, or was it a search term you saw elsewhere? Typos: Could it be a misspelling of another term?