It's very important to get it centred. With pads with a hole in them, I aim it up perfectly each time but 4 inch CCS with no hole need to be looked at very closely. It usually takes me three attempts or less to get it spot on.
In some cases, without a centreing tool you cant quite get the bigger ones with no hole spot on.
Your pad in that video is just a few percent off, it would be ok to use like that but it is best to get it 100%.
I received one of those little tools in my big AG order earlier this year but can't find it now.