"Brave does not oppose one another. Brave does not make money over life. Brave did not spread hatred, cloud truth, build a wall. That is what fear does," Gillibrand says of news movies, including by President Donald Trump.
Gillibrand, 52, is one of six women seeking the democratic nomination and one of six senators running for president.
The video ends with an invitation to attend Gillibrand at the Trump International Hotel on March 24, where she plans to deliver "her positive, courageous vision of restoring America's moral integrity directly to President Trump's doorstep," her campaign said in a statement. that came with the video.
"We must remember what it feels like to be brave," she says. "We have launched ourselves into space and landed on the moon, if we can do that, we can certainly achieve universal health care. We can pay family law for everyone, end weapons, send a green new price, get money out of politics and take our democracy back. None of this is impossible. "
"The Americans are brave every day … And it is these brave choices that inspire me to take the battles against others, it won't," Gillibrand says.
She will begin her official campaign with a trip to Michigan, a once solid blue state, which the Democratic candidate Hillary Clinton lost to Trump.
Her first week as a declared candidate will include a visit to the early voting states of Iowa and Nevada, culminating in her speech on March 24 in front of the Trump International Hotel.
She was re-elected to the Senate in 2018 and rose to national prominence as a pronounced critic of Trump, advocating women's issues and a strong advocate of the # MeToo movement – all of which will be central to her 2020 campaign.
In 2017, she was the first senator to call former Minnesota Democrat Al Franken to resign from the Senate after alleging that he touched women inappropriately.
A female senate for Gillibrand resigned in 2018 when she accused a male senior sexual harassment advisor and felt the investigation was "badly" handled. The accused employee was not fired at the time of the allegations.
Her former conservative record on immigration, arms and gay marriage has also been investigated by the left and attacked by Republicans seeking to paint her as a flip flop.
Currently, Gillibrand has not yet reached the 1% mark in polls, a demand from the Democratic National Committee to be included in the forthcoming 2020 debates.
This story has been updated to correct the date of the rally in front of the Trump International Hotel.
CNN's Dan Merica has contributed to this report.