Right-click the file and select Properties (Windows) or Get Info (Mac) to see if there are any tags or comments in the "Details" tab.
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
Some internal stock libraries use these alphanumeric strings to track licensing and metadata for specific clips. How to Find the "Solid Content" Right-click the file and select Properties (Windows) or
Look at the names of the files immediately before ( btb_07_0119 ) and after it ( btb_07_0121 ) to establish the subject matter. btb_07_0120.mp4