My entire video broke by accident

[brian]

Did you turn on backup? Maybe you can check for Other Versions

File > Backup and Save

Making backup copies of a project can be very helpful in case we want to go back to a known good state of the project. A project backup can be created, either manually with File > Backup and Save or automatically with Settings > Backup. [Photoshop_1RLxGk4eGr] When a backup occurs, the project backup appears in File > Other Versions. [Photoshop_WXpQ7WPlD5]

If not, you can upload your MLT file here and we can inspect to see if anything can be recovered.