Former Newcastle Knights star Alex McKinnon, who sustained a terrible spinal injury following a risky tackle during a match against the Melbourne Storm, has shared a video of his recovery in which he can walk with help. The video, which was posted online by Newscorp and features McKinnon singing The Star-Spangled Banner before taking several steps unaided, has been viewed more than 1 million times since it was published on Saturday. McKinnon's wife Lisa and son Harry have also shared photos and videos on social media showing how their lives have changed since the accident. The 25-year-old was playing for Newcastle's NRL team when he was injured in April 2014. He underwent multiple operations to try and restore some feeling to his legs but was not able to walk again. However, over the past few months he has managed to gain control of a computer mouse and press buttons with his hands to write messages to friends and family. In the video, which was filmed at Hunter Medical Research Institute (HMRI) in Newington, near Sydney, McKinnon can be seen wearing a neck brace and using crutches to move around the room. But he is able to sing along to The Star-Spangled Banner without assistance or error once he reaches the part of the song where the flag is raised to its full height.