The area lies near the site of a seaside village buried in lava from a 1960 eruption.
In the second video, taken about seven hours later (around 1:38 p.m.), lava had almost filled the shallow bay and was close to covering Champagne Ponds (right side of the screen, toward the end of the video) in the north part of Kapoho Bay.
Lava now extends more than a half-mile into Kapoho Bay, according to the Hawaiian Volcano Observatory.
County Managing Director Wil Okabe said his own vacation home in Kapoho Beach Lots is also threatened.
Hawaii Civil Defense Service officials said they went through the neighborhood to warn residents this was their last chance to evacuate before their final escape route was cut off by lava.
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An estimated 500 people live in the Kapoho area, but Snyder said it was not immediately clear how many residents, if any, had chosen to stay behind.
Kilauea, standing at 4,091 ft (1,247 metres) tall, has now been erupting for 34 days in a row, the longest since 1955. "A Hawaiian County Fire Department overflight reported that the lava filled the lake and apparently evaporated all the water", the report said.
Lava early Tuesday destroyed Big Island Mayor Harry Kim's second home in Vacationland, Snyder said.
The flow prompted warnings from Hawaii County Civil Defense authorities about laze, a noxious cocktail of lava and haze that sends hydrochloric acid and volcanic glass particles into the air.
The United States Geological Survey provides aerial footage of lava pouring into the Big Island's Kapoho Bay.
There have been various arrests of people forcing their way through blocked areas.
At the same time, most of the Hawaii Volcanoes National Park, one of the island's biggest tourist attractions, remains closed indefinitely due to hazards from ash and volcanic rock ejected from the summit crater, and accompanying earthquakes that have damaged park facilities. He faces charges that include refusing to evacuate and reckless driving.