Here's an explanation from 2013. It even has a pictorial explanation on page 2.
The transfer of genes encoding antibodies (‘antibody gene transfer’) is a novel protective strategy that bypasses the natural immune response, which has been the central focus of previous attempts to develop a vaccine against HIV, by directing the production of antibodies from nonhematopoietic tissues, such as muscle (Fig. 1). Because this approach skips many of the steps in the usual path of vaccine development, it has been described as a ‘leapfrog’ strategy.
https://www.nature.com/articles/ni.2480.pdf
Do take a look at the picture, specifically the right side of the picture, insert #3 at the elbow.
The genes in this paper encode antibodies.
The covid vaccines encode viral antigens, and the natural human immune system makes antibodies (and induces specific T cells) to the antigens. Thus this paper is irrelevant!!!!
Why is this alleged “peer-reviewed study” on a podcast, instead of citations to published papers in legitimate journals? Show us the evidence!!!!