video in adobe animate

Hi, I have a big problem with the application made in adobe animate and please help.
I have 5 video files, each should be loaded after pressing the appropriate button and after playback it should turn off / disappear so that the startup animation is visible. I tried many options and nothing works. The flv files are of low quality, the mp4 files do not have the alpch channel (for smooth transition) and I can't earn enough to switch to another frame after the playback. The application must use an action script - it cannot be in html5. Please help!!!
Eve