At this stage you will read and find a lot of frustrated comments about Easypano. Many bugs are to be ironed out and in many ways TW7.0 appears to be a backward step over TW6.5. Sure we all like to get new options but more important is to fix bugs that are preexisting before introducing more new bugs to the party.
Of course not everything is Easypano's fault. Goal posts are continually moved by the browser developers and the ever evolving mobile market.
Basically Touweaver downloads the "Skin and First Scene" before displaying. Once this has happened all other objects start to download in the background. You should be cautious of Video file size unless you find a way to stream it. Which can be done using 3rd Party software like those offered by www.increditools.com
Be aware this is fine for Flash. But hardly useful for Apple Safari HTML5 tours.