Dropping video resolution to low medium will probably resolve you. I believe this is likely graphics performance related - so changing various graphics settings is the best you'll be able to do in 2.3.
Video resolution to low medium will be 720p 30fps for these cinematics instead of 1080p 60fps. Adjusting that will only affect these new level ups, Aphelios, and Trundle. Changing baseline graphics settings will affect a lot more but also probably solve it.
I can't promise an exact timeline for a better answer, but we're actively looking at ways to make these play more consistently across a wider range of devices.