When will Mosh release the SASS/SCSS course


I saw that in the The Ultimate HTML5 & CSS3 Series: Part 2 course at the 3rd video in the CSS Best Practices lesson, Mosh said he is going to release the video on SASS/SCSS soon. Anyone has any idea when this course will be released approximately? If not, any recommendation on good SASS/SCSS course that is as detailed as Mosh’s courses? I tried to search on youtube but I dont think the quality of the courses over there is sufficiently good.

I appreciate all the helps.
Thank you!