How to do Software as Medical Device Development correctly? 

I'm happy you liked the content. Perhaps you also like the content presented in this webinar: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FQrjnTuE8K0.html

You are always free to combine information as you find it meaningful. The challenge you might face is that auditors might look for specific documents, but it shouldn't be a problem if you explain your approach. You might find this video helpful, where I'm talking about documenting compliance with IEC 62304: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SHNFJQ_81YE.html&t

Or even, active implantable? Thank you so much!

An active device can include a Software so yes a MDSW can be part os an active device.