: If "OTDRR" refers to Optical Time-Domain Reflectometry data stored in a video format, you might need a specialized viewer or a metadata extractor like MediaInfo .

In the meantime, here are the most common ways people "add features" to or process an MP4 file:

To help you with this, I need a little more context on what you mean by a "feature."

Could you clarify (e.g., convert it, edit it, or find where to download it safely)?