Typically when we talk about evaluation, we are using the CRAP (or CRAAP) test. This can still be a helpful process, but it doesn't quite fit as well with media sources as it does with text ones. These criteria are better suited to the evaluation of media sources.
SOURCE OF MEDIA
Gathered through your observations, the information provided with the file, and through additional research:
"Visual literacy skills equip a learner to understand and analyze the contextual, cultural, ethical, aesthetic, intellectual, and technical components involved in the production and use of visual materials. A visually literate individual is both a critical consumer of visual media and a competent contributor to a body of shared knowledge and culture." ACRL Visual Literacy Competency Standards for Higher Education