Banned for Too Many Youtube Comments?

Hey everyone! Just had a quick question. Thanks in advance for reading this.

So, say I have two channels, a channel where I upload videos on (and have been doing so for about a year; mostly normal Youtube activity) and an account that I pretty much never use except for this. Let's call the first one account 1 and the second one account 2.

If I were to leave around 75 comments on different videos each day of very similar messages (part of it is copied and pasted, but part of it I type in and make different for each video, so technically each comment is slightly different) with account 1 and then subscribe to all 75 of the channels who put out these 75 different videos with account 2 (I prefer to separate the subscriptions from my main account), is there any chance my account(s) would get banned? Because I've put a lot of work into account 1 and I would rather not risk it getting banned. I've done this in the past and haven't had problems with it, but I sort of just wanted to be safe, I guess.

Also just to clarify, no bots of any sort are used, and no links of any sort are involved.

Any help would be much appreciated!

If they are spammy comments, or seen as spam by users and flagged, and you keep doing it, you will risk your account. Doesn't matter if you do it manually or not, matters what kind of comments you're making.

When you are commenting on Youtube you want to look a normal user participating and not a spammer.If you receive too many spam complaints your account is done.Normal users not only comment but also like,share and subscribe.When I checked on one my niche Youtube channel ,this idiot keep spamming my every video on my channel with his comments got autoflagged and also his links.

either make your comments realistic or stop commenting!
there is a possibility of your account getting banned if enough people flags your account!

This is good to know, i haven't really reached that point of spamming too much there, was wondering what could happen.

Thanks for the input guys. I think I'm done with commenting like this for the most part. Really not worth the risk. Appreciate the responses!