Buying YT Accounts in Bulk = How to add Channels/art?

[Magma]

Hello,
I'm testing out some mass YT posting software and strategies, so I've bought 50 PvA YT Accounts and have proxies.

But none of the strategies explain how to 'season' the accounts.

What I mean is, if I buy 50 YT accounts then suddenly start uploading videos to them, aggressively, I figure it's possible they might trigger some kind of ban or limitation.

So I thought I should add channels to them each, banner art and logos to the channels, etc. Maybe add 1 or 2 videos over a few weeks to start, before using them more aggressively.

But doing that one-by-one would take months -- is there some software that can automate this process?

Ideas?

Thanks.