Okay so I watched the video, and you're about a little bit under the skill level I was at when I tore mine (October 23rd, 2009) except you have barspins a lot better than I did at that time, and a few other nitpicks. So this shouldn't be that hard to explain.
So, you're 4 months Post-Op. Do NOT jump the gun at this point, this is the point where the ACL is still transforming into an ACL & will be weak. By the 5th month period, you can ease back into it and slowly get your skill level back up. 4th month, if you REALLY must, stick to just manuals & 180s. I don't recommend doing that though. I started back up slowly at just under the 2 month mark of Post-Op, I was doing 180s, manuals, wallrides even though I was told not to. The itch was so big! Plus, just riding & pedaling is GOOD for the ACL! But of course I got the itch to do tricks and eased back into it early, luckily I didn't fuck up and tear it again but so easily could have. By the 5th month "OK" period the doctor gave me to ease back into it, I was already back to doing manual 180s, bar height grinds, 360s off higher things, and random things in between. Barspins though, I don't recommend trying until later in the 5 month mark because I tried one and slammed my knee really hard & it hurt like fuck cause that area was super sensitive. You're better at them though so you might not but still.
Here's an edit filmed from the 4, 5 & 6 month period of riding when I was just getting back into it
boyle iphone edit from boyleee on Vimeo.
There's an edit floating around of me & my 2 friends when I was about 2-4 months getting back into it somewhere, I'll link you if I find it. Basically stuff like that is all you should stick with at the moment, nothing crazy like manual bars or big 360s.
Also, curious, what type of surgery did you have? I had a hamstring graft done to mine.
