Hi.
This won't be a problem either for monetization or visitors. If this is not a one-person video blog, then it is even better to use voice acting from different people, because sometimes the performer who voices the video disappears and stops doing this, you will need to urgently look for a new one, and this takes time, which turns into downtime in business and money loss. I try to hire several people for the same task so that there are no problems later.