to be more clear: block chain for images is a solution in search of a problem because no one is looking for mass-verified images, they are looking for source-verified images, because you can still fake something on the block chain at point of creation. In 2025 the main concern about faked images is with AI, but more sophisticated and more convincing images can be made with older, even analog technology like airbrushing.
Your example of a sped up Democrat could still be disseminated on the block chain and it would do nothing to confirm or deny its veracity.