Adding a graphic to a screen recording...and getting it to stay in sync on playback

Hello! I'm building a series of software simulation modules. Each module starts with a set of 'show me' slides using the Video on a single slide recording option. I want to add various highlight features and in-video captions on the screen and that's done easily enough. I also want to add the video control timebar so folks can replay certain sections if they'd like - again easily done in the video option tab. However, on publishing, if the learner does drag the timebar then the timing of these graphics falls out of sync. Have a looksee at the attached to see what I mean - watch the brief example video through first and then mess with the timebar to see how the graphics can fall out of sync.

I can see that this happens as the timeline for the graphics marches on irrespective of the video timeline which the learner can move at will. So...is there a way to sync the graphics so that moving the timebar doesn't put the two out of sync. I realise that adding highlight graphics can be achieved by creating the video as a Step-by-step option but I think that's really messy with all the extra slides and I can't see how to format the size of the playback screen and the background layout when these slides are produced.

Thank you