loading screen for preloading videos

hi everybody,

i'm working on an app that has to deal with 8 videos that need to be preloaded at the same, switching between the videos should work smoothly. therefore completely preloading all the videos would be necessary. is there any way to make this happen? i.e. a loading screen that proceeds to the layout after all videos have been preloaded?

any help would be very much appreciated!

thanks a lot in advance!

here's an example:

bad-vitrinen.netlify.com

grab the phone with the mouse and turn it to blend the videos into each other. clicking inside the phone will change the view.