Free resource
Dashu Mandarin 大叔中文 (YouTube)
Unrated听力 Listening语法 Grammar
My notes
Practical, colloquial Chinese explanations. Good for filling gaps between formal study materials and how the language is actually used.
大叔中文 focuses on practical colloquial Chinese that doesn't always appear in textbooks — the kind of phrasing that makes a sentence sound natural to a native speaker rather than grammatically correct but stilted. I found it useful for filling the gap between what the HSK books teach and what I actually needed to produce in a real conversation. Worth bookmarking for when you notice a pattern in your speech that feels technically correct but sounds unnatural.