However, based on standard naming conventions for educational and corporate video repositories, here is what that identifier often signifies: Potential Contexts
If you can or provide the name of the course/platform it belongs to, I can likely find the specific lesson summary or key takeaways for you. btb_07_0120.mp4
Could you tell me or what subject you’re currently studying? a company portal
Are you seeing this in a course like Coursera, a company portal, or a specific YouTube playlist? btb_07_0120.mp4
Look at the names of the files immediately before ( btb_07_0119 ) and after it ( btb_07_0121 ) to establish the subject matter.