Sad, you are not eligible for super 811.
No, it's not mandatory to credit 5K from your own account.
Yes, if person X sends you ≥ 5K, it will be counted.
I have never added money manually until now (this month), and it's been 3 months already. But, there was a discussion few pages back regarding the same question.
Technically, you should manually add 5000 in the Kotak 811 app. Just because I’ve been receiving it for the past few months, it doesn't mean I will continue to get it in the future. It’s a bug & Kotak can fix it at any time without any announcement.
In short, I've started adding manually.