1. Apparatus for adjustment of magnetic head tracking position responsive to control track and reference video pulses in a video recorder/reproducer apparatus, comprising: first means for determining the level of the video signal; second means responsive to said first means for changing the phase between the control track and reference video pulses a plurality of times including means responsive to said first means for changing the phase between the control track and reference video pulses in a first direction until said first means determines, at a first point, that said video signal level begins to decrease, means responsive to said first means for changing the phase between the control track and reference video pulses in a second direction until said first means determines, at a second point, that said video signal begins to decrease, means for storing first and second values corresponding to said first and second points, and means for averaging said first and second values to produce a first output indicative of a desired value of said phase; and third means responsive to said first output for adjusting the phase between the control track and reference video pulses to said desired value.