When I publish storyline to video loading dots and blink appear between some of the slides

Hi ChandraKanthi-P​ - when you say 'publish as video', do you mean exporting your project so it plays as a video, rather than an interactive elearning?

I don't often use this feature, but in the past when I have encountered the 'loading dots' between slides in a published Storyline project, this is usually caused by the next slide containing a large media file, such as a video, audio or GIF, which takes a second or two to fully load.

I've never seen this behaviour in a 'publish as video' output, but the cause could be the same: do you have any large media files that are taking a moment or two to load/render?