Jittery, jerky, shaky, stuttering animation
This course is not in HTML5. Every slide has entrance animations at the very beginning of the slide. Plus lots of animations on the slides. The course is not too huge. About 144mb.
When I publish the course, I'm setting all the quality sliders to their highest. Bandwidth is not an issue.
When I publish it online (either web or LMS) ALL of the initial slide animations stutter, or are jerky, shakey, jittery, unsmooth, whathaveyou. Once you're into the slide all of the animations are smooth as silk. (including exit animations) No issues with going from base layer to other layers, either. All of my slides, do, however, get to the next slide from one of the layers on the previous slide.
I'm on the latest update of Storyline that was released this week.