I don't know if you can issue a web command from SmartThings but BI accepts a ton of HTTP commands that let you manage cameras, including triggering them, moving them to specific PTZ presets, and such. The HTTP Commands section in the BI help file has the list of commands you can use and the syntax for each command. I don't know how to issue a command from ST as I do all my ST automation in Webcore but BI can manage cameras, profiles, etc via web requests.