Doctrine Courses
SymfonyCasts Symfony Live Paris 2019 (French)
SymfonyCasts Lean and Mean Dev with PhpStorm (for Symfony)
SymfonyCasts Go Pro with Doctrine Queries (Legacy)
SymfonyCasts Starting in Symfony2: Course 1 (2.4+)
SymfonyCasts Starting in Symfony2: Course 2 (2.4+)
SymfonyCasts Doctrines for Formal Mathematics
Hausdorff Center for Mathematics via YouTube