How likely are bans if signing in with google?

[KatttTheFemboi]

I saw the disclaimer but my YouTube account has been perfectly fit to my liking for years, so I really want to use it with it, so I was just wondering how likely a ban actually is?

[iBicha]

I can't answer this question accurately, because even if I'm right, things can change overnight.
So this is not advice, these are general tips, and up to you to verify the accuracy and make a decision.

I haven't seen signs of permanent bans by YouTube, but I've seen posts from users saying their accounts are banned (up to weeks) when using tools like yt-dlp. Now these users were using cookies to login (some used OAuth, but still) and were downloading huge amounts of data, so they were simulating bot behaviour. I think perhaps using an app like Playlet where data usage is of a "normal" amount, it is less likely to be flagged as bot or malicious.

With that being said:

• I don't think YouTube will likely ban you for using your account, and if it did, I don't think it would be permanent
• You need to understand that YouTube reserves the right to ban your account at any moment https://www.youtube.com/t/terms#8d13a409a3

YouTube reserves the right to suspend or terminate your Google account or your access to all or part of the Service if (a) you materially or repeatedly breach this Agreement; (b) we are required to do so to comply with a legal requirement or a court order; or (c) we believe that there has been conduct that creates (or could create) liability or harm to any user, other third party, YouTube or our Affiliates.

While I don't see the usage of 3rd party apps specifically called out, they can technically update terms of service at any time, making that a breach of agreement.

• If your account data is super important to you, it's a good idea to download a backup using https://takeout.google.com/
• When you login using your YouTube account, the access token used by Playlet has full access to your account. While I did my due diligence in reasonably securing Playlet, but if a malicious actor was able to access your YouTube access token on your Roku device, they would be able to control your account.
• Just use common sense, and consider that you COULD get banned:
  • If getting banned makes you think "well this sucks, but not a big deal", then use Playlet login
  • If getting banned would cause you great emotional pain, then create data backup and/or don't use Playlet login
  • If you have an account with an important audience, or an account that is a revenue generating business, don't use Playlet login
  • When in doubt, create a new account to use YouTube on 3rd party apps, just to keep your main account(s) safe.