Media practice questions.

A video platform changes the objective of its recommender from the number of clicks a video receives to the total time viewers spend watching it. Within a year the videos that reach the front page are markedly longer. The best explanation is that

• audiences had suddenly grown tired of watching very short clips on phones
• the platform lifted its upload length limit in the same release
• creators adapt their output to whatever the ranking metric rewards
• longer video files are cheaper for the platform to store and to deliver

Answer: creators adapt their output to whatever the ranking metric rewards

The recommender's objective is a design decision by the platform, and creators optimise for it because visibility is what pays, so the change in content follows the metric rather than a change in taste. Digital Society treats the choice of ranking metric as an exercise of power over an entire occupational group.

A short video circulates in which a mayor appears to announce a curfew that was never ordered. The recording is synthetic. Beyond the false announcement itself, the most significant implication for public life is that

• video hosting services will need substantially more storage capacity
• genuine recordings can now be dismissed as fabrications
• editing software becomes harder for ordinary users to obtain
• broadcasters must employ more staff to read out official statements

Answer: genuine recordings can now be dismissed as fabrications

The second-order effect, sometimes called the liar's dividend, is that the mere possibility of synthetic video devalues authentic recordings for everyone, including genuine evidence of wrongdoing. The false curfew message is the immediate impact; the changed status of video is the implication.

A widely shared post gives the wrong date for a national election. The platform leaves it online, attaches a label linking to the electoral commission and stops the post being recommended to people who do not already follow the account. Which trade-off has the platform made?

• It has kept the post reachable for those who seek it while cutting the audience that meets it by chance
• It has removed the post in every country in which the election is taking place, which is the strictest measure available to it
• It has handed the decision to the electoral commission, which now decides whether the post remains online
• It has made the post unavailable to anyone who has not previously interacted with the account

Answer: It has kept the post reachable for those who seek it while cutting the audience that meets it by chance

Demotion with a label is the middle option between leaving a claim to circulate and removing it, and it buys a smaller audience at the price of leaving the false statement standing. It is also almost invisible to the poster, which is why complaints about it are hard to evidence.

A video service is free to use, sells no subscriptions and earns its revenue from advertisers buying access to defined audiences. In an analysis of this service, which description of its users is most accurate?

• They are its customers, because the service exists to satisfy them and would close without them
• They are one side of a two-sided market, supplying the attention and data that the paying side buys
• They are shareholders in the service, because their activity is what gives the company its value on the market
• They are unpaid employees, because the content they post is what other users come to watch

Answer: They are one side of a two-sided market, supplying the attention and data that the paying side buys

Naming who pays explains design decisions that otherwise look irrational, because the product being sold is a described audience rather than the video. It also identifies the stakeholder whose interests a change in ranking is most likely to serve.

One subscription now delivers live sport, a catalogue of films, a music library and a podcast feed through a single application on a single device. Twenty years earlier each reached the home through a different medium, a different device and a different company. Which process does this illustrate?

• Disintermediation, because the retailer standing between producer and audience has been removed
• Globalisation, because the same catalogue is sold in every country at the same moment
• Convergence, because formerly separate media, devices and industries meet in one service
• Fragmentation, because audiences are divided into ever smaller and more specialised groups than before

Answer: Convergence, because formerly separate media, devices and industries meet in one service

Convergence describes the meeting of content, devices and industries that were once regulated separately, which is why broadcasting rules and telecommunications rules keep colliding in the same service. The other three processes are real but describe different movements.

A fitness influencer posts an enthusiastic video about a supplement brand without mentioning that the brand paid for the post. Regulators such as the UK's Advertising Standards Authority require such posts to be labelled as ads mainly because

• an advert works differently when readers believe it is a personal opinion
• paid posts are more likely than normal posts to contain false claims
• influencers do not pay tax on income that is not publicly declared
• platforms cannot rank a post correctly unless it is labelled as an advert

Answer: an advert works differently when readers believe it is a personal opinion

Disclosure rules protect the audience's ability to apply the scepticism they reserve for advertising; hidden sponsorship borrows the trust of a personal recommendation. The error is to treat labelling as being about the content's truth — an accurate but undisclosed ad still breaks the rules.