This is not true.
In this very thread. You can see a small part of mrs klixen in the background filming an alternate angle in old scenes.
Im sure he still has another person filming sometimes.
There was a guy who came onto the klixen fanpage on reddit claiming he worked with Mr.Klixen and Mrs.Klixen and was taking questions from many fans on there like a week ago..He was anonymous but he said he did camera work for the studio up until 2016 i think.
He releases clips in wmv a few weeks after they were first released in mp4, so when listed in chronological order it does look like the order is fucked up.