A 'Flash Intro'. They used to be a thing. Annoying intro sequences before you got to the home page of a website - the basic aim of which was to show off a bit about what the site did - or rather just show off what the Flash animator had found out what to do in a 'wooooooo' sort of way. This was one of the first I did, just after learning about Flash's morph tweening abilities.
<object type="application/x-shockwave-flash" data="http://www.leighhowells.com/assets/museum/flash/hoteline.swf" width="100%" height="550px" >