Good tutorial for VST GUI design?

I can’t find any good videos regarding the Plugin UI editor

Can anyone please recommend some competent videos? Furthermore, where can I get example knob images and stuff? I’m coding this plugin in c++ through the SDK VST, and I have been using the .uidesc file to edit the GUI plus the UI Plugin editor but I need more help!!

Don’t know about any videos for vstgui, but maybe this is the best place to start?