Ключевые слова: academic, audience, briefing, business, businessman, camera, center, coaching, conference, congress, convention, corporate, crowd, education, educator, event, explaining, forum, group, hall, hand, indoors, information, institute, lecture, lecturer, listeners, live, manager, meeting, mobile, participants, people, photo, presentation, professional, public, screen, seminar, sitting, smartphone, speaker, speech, streaming, talk, teaching, training, university, video, workshop,