Mark needs to buy a camera for his daughter for her video production class in high school. Leo doesn't recommend a camcorder much anymore, though. The budget is $500. Leo says that any camera can take great videos now.
Leo recommends a Micro Four-Thirds camera because she'll get the best of both worlds being able to change lenses while still having a compact design. Panasonic is the best option. They could probably pick up an older GX1, GF3 or GH3 to do it. The Sony Alpha 6300 is another one to consider, but it's about $1,000. The Panasonic G7 with a kit lens is about $600 and would give her the ability to record in 4K.
Leo recommends checking out DPReview.com for camera reviews.