A new report has found one in five Irish adults admit downloading TV shows or movies illegally over the last year. Almost 37,000 adults here illegally download such content every day.

A study by Core Media has found younger adults are most likely to download content - with one in three aged between 15 and 24 having done so in the past year.

That falls to just one in 20 for those aged 55 or older.

According to Nielsen, more than 7% of the Irish population claimed to subscribe to an additional TV download service in 2013 - with Netflix being the most popular.

Core Media says linear TV is now seeing decline - but that more video content is being watched than ever before in different ways.

Across the island of Ireland, it estimates that content viewed on non-TV devices accounts for 11% of all viewing.

This is expected to grow as technology becomes more accessible.

It finds that despite the slight fall in audience levels, TV spend levels are set to increase by 3% in the Republic and 4% in Northern Ireland - because of the brighter economic outlook.

But it's not all about TV. The same study finds that between three and four million radio station apps have been downloaded on the island of Ireland, as it becomes a preferred way of listening.

"As free wi-fi and 4G expand, and data costs drop, this is only set to increase. Many of these apps require customers to sign up; because of this and embedded code known as ‘cookies’, radio stations will have access to the kind of audience data that is currently the preserve of online networks," the study says.

Nick Fletcher is broadcast director with Core Media.

He told Newstalk Breakfast earlier that online streaming services have had an impact - but people still want to see the latest programmes as soon as they are broadcast.