No wonder that probe of videoscope is often the most fragile part. It is subject to various influences including sharp edges of metal parts of engines. However metal braiding of PVC covered probe increases resistance against external impacts. Videoscope with such a probe can be more easily used during inspection of hard-to-reach places. The more - thin probe can be inserted through smallest entries and gives a nice image.
Please check this video taked by 4 mm probe with articulation. More information here