After gameplay I retimed this run using https://somewes.com/frame-count/ with a console FPS of 60.098813897441 which is the NES native framerate according to http://tasvideos.org/PlatformFramerates.html and raw video framerate of 30 FPS for a total of 9490 frames or a Console Time of 5:16.329. First Frame set on the frame "400" appears in the top right corner after selecting 1 player and End Frame set on the frame all sprites are invisible after touching the axe in 8-4.

I use Nintendo Entertainment System Model No. NES-001 with "Super Mario Bros. / Duck Hunt" cartridge Model NES-MH-CAN and GV-USB2 Capture Card. Console check at the end of the run though I had the camara flipped to accommodate the handcam.