Alena Stepanova [2021-04-13 12-39-41].ts -

Timestamp indicating the recording date and time.

Without context, it is impossible to determine the specific content of the video. Alena Stepanova [2021-04-13 12-39-41].ts

Do you have on where you found this file (e.g., a specific website, folder, or project), or are you trying to open/convert it? Knowing this can help me provide more relevant info. Timestamp indicating the recording date and time

A video file format often used for streaming or broadcasting. a specific website

This appears to be a filename for a video recording in transport stream ( .ts ) format, likely created on April 13, 2021, at 12:39:41. The subject or recorder of the video.