One of Alan Rickman's final performances was to narrate a viral video aimed at raising money for refugees.

The recently-deceased British actor narrated the video for OneClickGiving, a charitable initiative founded by students at Oxford University, about a month before he died of cancer.

In the video, titled "This Tortoise Could Save a Life," a small tortoise can be seen blissfully munching away on a strawberry, while Rickman's voice explains the OneClickGiving charitable campaign.

"We're trying to make a viral video to help refugees. We're slowly gathering views as this tortoise munches away," Rickman says.

He then explains that OneClickGiving will donate all YouTube revenue from the video to Save the Children and Refugee Council.

"All you need to do is watch and share. Together, you and this tortoise can make a difference."