Bed leveling help

i just bought a used Sv06 printer and tried to level the bed. i followed the instructions from the youtube video. but when it gets to the part where it levels all the points it only does the first one it says bed leveling ready, it then rams into the left side. i also dont know if its suppose to make that buzzing sound for that long maybe 4-5 seconds.
so my question is am i missing a step? how do i fix it?

The buzz sound is probably the homing senor-

There are a heap of videos on this Sovol site just make sure you go to the “Videos” section and not just the “Home” or “Playlist” section on the site, for some reason some of the good videos for newbies are here, but have a look at the Playlist and Home pages anyway-

here is a link to their YouTube/videos