Hey there, I manage 5 accounts per mobile device and whenever one of the accounts got a community guideline strike, my other accounts on that device are safe. But, whenever you got struck by a second strike, your other accounts may be in danger. If you upload the same videos on all of the accounts, do that with a little test first. Upload it on one account, if it passes the guidelines you are good to go, you can upload that video on all accounts if you want. Be careful with the first strike.
Don't use more than 5 accounts per device.
If you somehow get in a situation like yours now, do the factory reset on your device and begin from the scratch.
You have many tutorials here on the forum on how to make your spare phone clean again.