The rapid advancement of digital technologies has ushered in the era of deepfakes, posing new challenges for media literacy and information integrity. Using a diary study, this research captures insights into the verification processes of two age groups, Generation Z (Gen Zs) and seniors, in identifying deepfake videos. We found that Gen Zs heavily relied on technological aids, utilizing search engines and social media platforms for deepfake identification. In contrast, seniors prioritize content consistency and source credibility, by leveraging on their life experiences and conventional media literacy skills. This generational divide highlights the need for tailored educational programs that enhance critical analysis capabilities in younger users while encouraging digital fluency among older adults.