Ok, I list some things that I think you should try to do. I'm currently at work so I can't check any frame data, so please forgive me if I might be incorrect in same cases.
HE: In general, you took a lot of advantage from your opponent's ignorance. Two out of three times they did not throw punish your unsafe stuff or tried to retaliate with attacks, which you blocked. I just mention it because you should know that you could have get punished a lot more if you would have faced an opponent that is aware of Kasumi's frame data (and/or played offline).
ME: I know , that she is unsafe and get punnished a lot but I will not give up with her. I have analyzed my gameplay too and I agree waht you said. Yeah I made mistakes and got lucky 2 - 3 times. I am just a casual gamer ^^ .
HE: I don't know if it was just accidental input (almost looks like), but you better don't toss out 33P in neutral. As a good high crush, you just should use it if you know that your opponent is going for a high attack.
ME: Hmm okay. I didnt know that. Knowledge is power ^^.
HE: Never(!) use 7K in a neutral situation like you did at 1:17. It is simply too unsafe on block (~ -40 as far as I remember), which means your opponent can do almost everything with you after it. You may have noticed that you got stunned immediately after it missed.
ME: No , no this was my mistake for press the wrong input. I wanted to make 9P >.<. But I have understand what do you still mean. Thank you.
HE: You tend to finish all of Kasumi's strings (like PP2K) and you rarely use string delay (e.g. from 6PK). If you use tick throwing more (P or PP, then 6T or 66T) you will become less predictable.
ME: I wanted to test PP2K. This was my first time to use it in a real match. Yeah you are right. I agree. I have to throw more and make some different moves to become less predictable.
HE:The amount you try to go for a critical burst is also too high and too obvious (e.g. at 2:35). Kasumi does not have to rely on critical bursts that much, you better go for a launch and a juggle instead. Very nice usage of her guaranteed power blow after 236T from the ceiling and her quick launcher like 8K and 3H+K though.
ME: Okay I got it. These CBs comes from Hayabusa but this is another story. I always forget that Kasumi doesnt need it to much. There are days I use 9K,8K ,236P ,P6P more than CBs.
HE: In the second fight, you retaliate with K3K a lot, which is a good idea against slower characters or those who have parries. Just remember that finishing this string (the 3K) is considerable unsafe on block. Your opponent missed throw punishment there but you may consider to use KK6K or similar for a chance of a launch instead.
ME: I am unsafe after K3K (3K) when the opponent are blocking ? Hmm Okay.I didnt know it. I got lucky because the opponent saw Kasumis prettiness and got confused/stunned to punish me ^^. I will consider it ^^.
HE: In terms of throw punishment, try to use 6T more. It is unbreakable, and comes out very fast (i7, not sure). Using 236T or her high damage throws like the oboro is only recommend if you are sure that your opponent is going for a hold.
ME: I agree. I am just stupid for this game. This is why , what I dont get it. I tell for myself make oboro and or use more 236T instead of using mor 6T for a throw punnish :I
I wish Kasumi would get her old Oboro back ( Body Neck massage )
HE : That's all so far, I hope I'm not too harshly