Authenticate 10-Second Video for Court purposes

I have a single, ten-second clip that will be presented as evidence and I need a qualified digital-forensics professional to examine it and confirm its authenticity. The scope is limited to video-authenticity verification—no timestamp or source-device work is required—yet the findings must be robust enough to satisfy courtroom scrutiny.

Here’s what I expect: a forensically sound acquisition of the file, a concise report that explains the methods you used, and a clear statement on whether any signs of tampering were detected. If your jurisdiction allows, an affidavit or declaration that can be filed with the court would be ideal, though not strictly mandatory at this stage.

Please tell me about your direct experience performing digital-forensics analyses for legal proceedings; that information alone will guide my decision.