: Before downloading anything new, open the corrupted file in WinRAR , click the Tools menu, and select Repair archive . It will attempt to rebuild the archive.

If you are getting "Checksum error" or "Archive is corrupt" when trying to extract the video, the RAR file itself needs fixing:

: A dedicated tool designed to scan and extract files from damaged RAR archives that standard extractors can't handle.

If you can open the archive but the video file inside won't play, you can download these specialized video repair tools:

: A lightweight application that automates the recovery process for all versions of RAR and SFX files. 3. Free Alternatives (No Download Required) Video Repair Tool