def get_bb_videos(html_path):
    with open(html_path, 'r', encoding='utf-8') as f:
        bb_html = f.read()
    b = Blackboard(bb_html)
    lessonkeys = b.lessonkeys()
    for key in lessonkeys:
        get_classin_video(key)
def get_bb_videos(html_path):
    with open(html_path, 'r', encoding='utf-8') as f:
        bb_html = f.read()
    b = Blackboard(bb_html)
    lessonkeys = b.lessonkeys()
    for key in lessonkeys:
        get_classin_video(key)