The new on-demand channel, a first for the 165-year-old museum, is available on the BT Vision platform at no extra cost to customers, regardless of what package they are on.
It shows mainly long and short-form documentary films on a range of subjects, including Journeys of Faith, Great Leaders, Stories of the World, Contemporary Artists and Shakespeare.
There will also be a number of lectures and short films available linked to current exhibitions at the museum. The channel will share its video content with a dedicated website, YouTube channel and on social media sites.
BT Vision chief executive Marc Watson said that it was "a privilege" to be a partner with the British Museum.
"Our customers can visit the museum without leaving their armchairs and see captivating stories of humanity, from civilisations which disappeared thousands of years ago to the world we live in today," he said.
British Museum director of public engagement Joanna Mackle added: "This is a really exciting collaboration. BT Vision is a wonderful way to widen access to some fascinating documentaries from the British Museum.
"We are keen to share our content freely and as widely to allow as many people as possible access to the collections and the wonderful stories it tells.
"Viewers will be able to stay up to the minute with current programmes by watching lectures and films linked to our popular exhibitions."
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