У вашего броузера проблема в совместимости с HTML5
ROBLOX supports mesh uploading. Use it. This video is obsolete.
**IMPORTER HAS BEEN RELEASED** GET IT HERE: http://www.roblox.com/obj-importer-v1-2-1-item?id=132434545
This is a script a good friend of mine named Magnalite has been working on. It allows you to import .obj 3D models into Roblox as long as it's not too large.