You will have approvals at every stage, however, approvals vary with the services you need.
In general, when you first receive your finished video, you have two rounds to make changes to animation, timing, sound effect, and music.
If you also need scriptwriting, for example, you will get a draft script and then have two rounds to make changes to that before the project even proceeds to the rest.
Approvals will be spelled out in our letter of agreement when we start to work together.   If you need special approvals built in (a client of your own or a tricky boss) or you need time for getting other approvals, I can build that in too.  Let’s discuss.