Example code for https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=119469

node.lua

gl.setup(NATIVE_WIDTH, NATIVE_HEIGHT)
node.alias "looper"

local Looper = function(file)
    local vid = resource.load_video(file, false, true)
    local function draw()
        util.draw_correct(vid, 0, 0, WIDTH, HEIGHT)
        return true
    end
    local function set_running(running)
        if running then
            vid:start()
        else
            vid:stop()
        end
    end
    return {
        draw = draw;
        set_running = set_running;
    }
end

local Intermission = function(file)
    local vid = resource.create_colored_texture(0, 0, 0, 0)
    local function draw()
        util.draw_correct(vid, 0, 0, WIDTH, HEIGHT)
        return vid:state() ~= "finished"
    end
    local function preload()
        if vid then vid:dispose() end
        vid = resource.load_video(file, false, false, true)
    end
    local function set_running(running)
        if running then
            vid:start()
        else
            preload()
        end
    end

    preload()

    return {
        draw = draw;
        set_running = set_running;
    }
end

local loop = Looper "loop.mp4"
local intermission = Intermission "intermission.mp4"

local surface

local function start_loop()
    loop.set_running(true)
    intermission.set_running(false)
    surface = loop
end

local function start_intermission()
    loop.set_running(false)
    intermission.set_running(true)
    surface = intermission
end

util.data_mapper{
    ["set"] = function(new_mode)
        if new_mode == "loop" then
            start_loop()
        else
            start_intermission()
        end
    end;
}

start_loop()

function node.render()
    if not surface.draw() then
        start_loop()
    end
end