Auto Bed Leveling - ANET A8

I am having issues with my auto bed leveling. I am trying to use Bilinear Leveling. When I go to try to auto home the z axis it pushes the front left side of the board all the way until it starts making a terrible grinding noise. Please help my sanity. My husband really wants this thing working.

My code is attached and the video with the sensor is below.

[www.youtube.com]

#define X_PROBE_OFFSET_FROM_EXTRUDER 0 // X offset: -left +right [of the nozzle]
#define Y_PROBE_OFFSET_FROM_EXTRUDER 0 // Y offset: -front +behind [the nozzle]
#define Z_PROBE_OFFSET_FROM_EXTRUDER 0 // Z offset: -below +above [the nozzle]

this say the nozzle and the probe are at the same location this is not accurate

If you using the same system as the video the probe is behind the hotend so you a minimum need to adjust Y to positive value
Z should probably be a -ve value as the probe point is lower the than hotend ttip