I’ve done a video course with Swedish online education service Moderskeppet. It’s about subtractive synthesis, mainly done on the Arturia Microbrute. 16 episodes, 1h 11min.
Free (due to the fact that it’s one of their first courses about music tech), but in Swedish.
Have a look - if you wanna learn about synthesis. Or Swedish language. 
http://guld.moderskeppet.se/kurser/kurs/sa-fungerar-en-synth/
another reason to improve my swedish…ermm…improve is probably a big word…i probably know 4-5 words which together don’t make a sentence 
