copypaste.lua

-- Default options
local opts = {
    -- Additional arguments to pass to loadfile when pasting, space-separated
    load_mode = "replace",
    load_index = "0",
    load_options = "",
}

require 'mp.options'.read_options(opts)

local utils = require 'mp.utils'

mp.add_key_binding(nil, 'copy', function()
    local path = mp.get_property('path')
    if path == nil then
        mp.osd_message('No path loaded to copy')
    else
        if path:find('://') then
            mp.set_property('clipboard/url', path)
        else
            local cwd = mp.get_property('working-directory')
            path = utils.join_path(cwd, path)
            mp.set_property('clipboard/path', path)
        end
    end
end)

mp.add_key_binding(nil, 'paste', function()
    local url = mp.get_property('clipboard/url')
    if url == nil then
        -- fallback on plaintext clipboard, with leading/trailing whitespace trimmed
        url = mp.get_property('clipboard/text'):match "^%s*(.-)%s*$"
    end
    if url == nil then
        mp.osd_message('No path or URL on clipboard')
    else
        mp.commandv('loadfile', url, opts.load_mode, opts.load_index, opts.load_options)
    end
end)