Breadth-First Search (BFS) Courses
Tsinghua University via Coursera BFS and DFS in Java
Great Learning via YouTube Binary Tree Traversal Techniques - DFS vs BFS - DFS Preorder vs Inorder vs Postorder
Simple Snippets via YouTube Graph Algorithms Crash Course (with Java)
freeCodeCamp Tree Traversal Algorithms - BFS and DFS - Preorder, Inorder, Postorder
CodeBeauty via YouTube Practicably Boosting the Processing Performance of BFS-like Algorithms on Semi-External Graph System via I-O-Efficient Graph Ordering
USENIX via YouTube