The Video below shows a RAF Eurofighter Typhoon jet belonging to the 29 Sqn making an emergency landing and using the tailhook system to come to a very quick halt on Mar. 9, 2017.
Tailhook landings by land-based aircraft are used in emergency situations to arrest planes experiencing failures that could imply a braking or steering malfunction. Like the one shown in the video.
According to Airshowvision, the popular channel that posted the interesting footage on Youtube, the procedure was required by a nosewheel problem: The pilot 10 miles out had reported a “nosewheel issue” and requested an emergency landing with the arrester mechanism.”
Land-based military airfields operating combat jets use arresting gear systems to slow the aircraft down in case of emergency: such systems feature arresting cables spanning the width of the runway.
Cables are typically 1 to 1.25 inches (2.5 to 3.2 centimeters) in diameter and suspended 1.5 to 3 inches (3.8 to 7.6 centimeters) above the pavement surface by rubber donuts 6 inches (15.2 centimeters) in diameter.
Overrun arresting gear consisting of hook cables and/or elastic nets known as barriers (or Safeland) are used as a backup system: they are raised by pilot’s request if needed to catch the planes before they reach the overrun area.
Temporary or deployment airbases may use expeditionary systems similar to the permanent ones; unlike the fixed systems these can be installed and removed in a matter of a few hours.