It's difficult to say which is the best affordable 4K video camera as it depends on personal preferences and specific needs. However, some options that stand out include the Panasonic Lumix G9, the DJI Akaso Brave 7 LE, the Sony ZV-1, the Fujifilm X-T4, and the Panasonic Lumix GH5 Mark II. The Lumix G9 is known for its solid and compact design, while the DJI Akaso Brave 7 LE offers good quality footage at a budget-friendly price point. The Sony ZV-1 is great for beginner filmmakers and YouTubers, with impressive low light video capture capabilities. The Fujifilm X-T4 is an all-around camera with great video quality, while the Panasonic Lumix GH5 Mark II is a popular choice for videography and filmmaking due to its excellent 6K footage. Ultimately, it's important to consider factors such as budget, intended use, and desired features when choosing the best affordable 4K video camera for your needs.