Ключевые слова: app, background, broadcast, broadcaster, broadcasting, business online, business training, cancel, cancellation, cancelled, change, cinema, concept, conference hall, contagion, covid19, design, device, digital, digitalization, empty seats, event, events happen, forum, idea, lessons, lights, live, movie, one touch, one touch transmission movie, online, online courses, pandemic, plan changing, planned, production, quarantine, realtime, refund, rejected, return tickets, stay home, stop, symposium, theater, tickets, training, transmission, work from home,