Theatre is pricey and divisive but can a livestream ever capture its flesh and blood thrills? Our film critic decided to find out " by legging it out of Kenneth Branagh's Romeo and Juliet at the interval … It has, in the past, taken all too little encouragement for me to express my bad-tempered and contradictory views concerning the theatre: namely, that it is pricey and divisive compared to cinema's democracy; and…