I just installed the plugin for eclipse as described but even after restarting the plugin is not showing up as in your video - not in the create project dialogue and also not under Window > Preferences. installation went through without any errors and it is listed under Help > About > Installation Details.
just pulled oF master, using Eclipse CDT Mars1, under Ubuntu 14.04
edit: problem might be independent of your plugin. found this http://stackoverflow.com/questions/2697882/plugins-installed-on-eclipse-not-visible and will try it out
update: no luck so far (with -clean, run as admin, install as admin, ...) and no error messages with -consoleLog -debug. installed another extension (Lua SDK) which worked.
more infos: plugin showing up under Installation Details > Installed Software:
openFrameworks eclipse plugin 0.1.0.201510121850 cc.openframeworks.feature.feature.group openFrameworks
but not under Features or Plug-Ins.
In Installation Details > Configuration I found:
*** Plug-in Registry:
cc.openframeworks.plugin (0.1.0.201510121850) "openFrameworks plugin" [Installed]
found it?: with the plug-in dev tools I found the entry
Bundle-RequiredExecutionEnvironment: JavaSE-1.8 and my java version is 1.7. is this why?
nope: same problem after switching to 1.8
solved: reinstalling eclipse mars after switching to 1.8, not using the installer, new workspace