Christian Redl, a record-holding free diver, explains the differences between exploration as a scuba diver and as a free diver. Scuba divers explore the underwater environment, while free divers focus on personal challenges and self-discovery. In the video, he demonstrates free diving in caves and mines, highlighting the difficulty of reaching the next air hole without running out of oxygen. This unique approach to underwater exploration can offer a different experience compared to traditional scuba diving.