We find no videos (or so little) on the internet with simple and useful explanations to play gypsy jazz themes.
When I learn the themes I am often faced with the same problems; how is played the basic theme? No frills, ornamentations, improvisations. I often try to find the first version of the theme, and then change it my way.
Here, a course with the theme Dark Eyes played in a basic way.
You have to activate the subtitles.