In the television industry, LSM (Live Slow Motion) is a proprietary system by EVS. Files with this naming convention are often training modules for the LSM-VIA remote panel, used by operators to create replays and highlights during live sports.

It may also relate to Label Switched Multicast (LSM) , an MPLS technology used for efficient video replication across large networks. Why use the MP4 Format?

In short, "Lsm13 01 02 mp4" is likely the second part of the first lesson in a series about or Live Replay systems .