YouTube channels are not easily hacked, but if you fall victim to this problem, we can help!
First, have you tried Google's account recovery process? Please click here (https://www.google.com/accounts/recovery) to recover your account first.
If account recovery is not successful, unfortunately we will not be able to recover your account for you. For your own security, we highly suggest you activateGoogle’s 2-step Verification on all of your accounts to avoid this.
Please also keep a back-up of all your videos because deleted videos usually cannot be recovered.