Video authentication is becoming increasingly important as video obtain and editing has become easier with the help of modern technologies. Also, tamper localization is getting more and more difficult due to the great development of editing software. Signature-based video authentication technologies rely on storing the video signature until authentication is required. This is a drawback because the signature is controlled by a single entity that can fail. Therefore, the centralized approach is not at all trustworthy. This paper proposes the use of Blockchain technology to store video signatures to solve such problems. In this framework, the video signature is stored in a decentralized network. It eliminates the need for a trusted third party and allowing for the control of private data. This system provides the ability to protect large data from manipulation and alteration attacks on the content. Where the size of the vector that is embedded on the blockchain is very small in comparison to the size of the video extracted from it. The change in the vector values indicates the change caused by manipulation within the single frame, so it can be determined which frames were attacked.