Kate Middleton said the coronavirus pandemic is going to "dramatically change" how much Britain values its NHS staff.
The Duchess of Cambridge said extra recognition for the hardworking lifesavers at the forefront of the crisis is the "one of the main positives that you can take from this".
The senior royal was speaking to the BBC's Tina Daheley alongside Prince William about a new phase of the government campaign Every Mind Matters.
The Public Health England scheme is focused on looking after people's mental wellbeing during the Covid-19 pandemic.
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A video narrated by the Cambridges is set to be broadcast across national TV channels and social media from Monday, April 20.
With the words “we’re in this together”, the couple herald the campaign which includes new NHS expert tips and advice on looking after mental wellbeing and supporting your family and loved ones during the crisis.
In the interview, which broadcast this morning, Ms Daheley asks William: "How are you helping get the message out there with Every Mind Matters?"
The duke said the scheme - which is in its "second guise" following feedback from the NHS and various case studies - is now more important than ever in the current climate in guiding people on their mental health.
"We felt very strongly that now more than ever this was a vital tool and a vital service that people could easily access at home to guide them and give them just some very basic tips to mind their mental health, to mind their mental wellbeing through this process," he said.
"I think again staying connected, staying positive and being able to talk to friends and family is so crucial and having just some tips and some ideas as to how to tackle some of these strange feelings and difficult circumstances we’re finding ourselves in is really important.
"Just to nudge us through these next few weeks," he added.
William went on to say while NHS workers are "used to dealing...with very sad situations" the "scale and speed" of the current crisis in hospitals will be taking its toll on their mental health.
He said for doctors and nurses having to see patients "dying with no family members around them" must be "very difficult".
"They are there right next to the bedsides, looking after and caring for each and every patient in a critical condition and I think they take away that pain and that sometimes that fear and loneliness that these patients have to go through.
"They’re the ones who absorb that and take it home to their families and I think again...that happening to somebody is not normal and we’re not superhuman any of us.
"So, to be able to manage those emotions and that feeling is going to take some time after all this is over as well," added the prince.
Ms Daheley asked Kate: "Do you think this will fundamentally change who we are and what we value?"
The duchess said "absolutely", adding that the country is now seeing that frontline workers "are doing the most extraordinary job and that's really coming to the forefront".
"I think it’s going to dramatically change how we all value and see our frontline workers and I think that is one of the main positives that you can take from this.
"They do an extraordinary job, it goes unrecognised daily and now I think all of us as a nation can really see how hard they work and how vital their work is," she added.
The campaign has been updated after new data shows over 4 in 5 Brits are worried about the effect that coronavirus is having on their life, with over half saying it was affecting their well-being.
The original launched last October with a similar video involving William and Kate and featuring Prince Harry and Meghan, before they quit the royal family.
Nearly half of those surveyed said they were experiencing high levels of anxiety due to the unprecedented time we are living in.
The tailored Covid-19 Mind Plan has specific content for individuals and their loved ones and gives support for specific mental wellbeing issues such as anxiety, stress, low mood and trouble sleeping.
The website signposts people to activities such as mindful breathing exercises, help reframing unhelpful thoughts, and muscle relaxation.
Go to https://www.nhs.uk/oneyou/every-mind-matters/ for more details.
