I have played and recorded the Italian Concerto for PS, too, and there is a most beautiful and elaborated version by Alfonso on this site, btw. Your version in summary is not the worst, but I have the following ideas of improvements:
1) to the 1st movement: the tempo could be more even, sometimes you run away or slow down, this kind of rubato shouldn´t be done too much in Bachs music and there are rhythmical imprecisions. A technical probelem is, that your touch seems to be too ponderous, which could be the reason also for the rhythmical and tempo-related uneveness. At some places there is too much pedal.
2) to the 2nd movement: the thirds are not ideally together at the beginning, otherwise it´s played nicely.
3) to the 3rd movement: in the runs there is rhythmical and tempo-related unpreciseness here and there and too much pedal (One should not use pedal in Bachs music while playing runs of seconds!). The touch is too ponderous, too. (May be you press too much while playing.) So, here are the same problems like in the first movement. The tempo in summary is too slow here.
You should increase your recording level, I had to put my volume on 60
, normally I listen with 30 to my and other recordings of PS! There are several audio editing programs, for free download f.ex. there is "Audacity" or I personally use "Wave Lab", which is not free. With such programs you can increase your recording level by normalization function f.ex. and cut out your slips from another take and much more useful things.
I hope you take my advices not as a personal critique, but just as what they are meant to be (see above, please).