The rotation-symmetry.html file needs to have the video links corrected for .mp4 files not .flv
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Change: “L403_1 Rotational-Symmetry-Cube.flv”
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To: “L403_1 Rotational-Symmetry-Cube.mp4”
and
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Change: “L403_2 Rotational-Symmetry-Tetrahedron.flv”
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To: “L403_2 Rotational-Symmetry-Tetrahedron.mp4”
Also, the slope-of-a-line.html file needs to have similar corrections
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Change: “104_1-change-in-x-and-y.flv”
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To: “104_1-change-in-x-and-y.mp4”
and
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Change “104_1-change-in-x-and-y.flv” (on line 295)
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To “104_2-Slope-of-a-line.mp4” (Note the change in file reference)