The excellent ebook Web Literacy for Student Fact-Checkers recommends four moves or strategies you can follow whenever you encounter a claim you would like to check.
Image authenticity and prior use
Recognizing photomontage or modified photos
Tracing Memes
Memes are images, videos, text, usually ironic or satirical, that becomes viral. These two tools help you track the creation and diffusion of the most well known viral memes.
Analyzing Video