Insert video to sequence editor with python Script i want to create a button for insert a video to video sequence editor.
i have written a script :

import bpy, os

class insertVideo(bpy.types.Operator):
    bl_idname = "scene.invideo"
    bl_label = "Insert Video"

    def execute(self, context):
        episode_path = "F:\\Dokumen\\Target\\Develop Apps\\addon_blender\\tes"
        bpy.ops.sequencer.movie_strip_add(episode_path)

class MyPanel(bpy.types.Panel):
    """Creates a Panel in the Object properties window"""
    bl_label = "My Tools"
    bl_idname = "my.panel"
    bl_space_type = 'SEQUENCE_EDITOR'
    bl_region_type = 'UI'

    def draw(self, context):
        layout = self.layout

        obj = context.object

        row = layout.row()
        row.label(text="Movie File")       
        row = layout.row()
        row.operator("scene.invideo", text="Insert Video")

def register():
    bpy.utils.register_class(MyPanel)
    bpy.utils.register_class(insertVideo)


def unregister():
    bpy.utils.unregister_class(MyPanel)
    bpy.utils.unregister_class(insertVideo)


if __name__ == "__main__":
    register()


In episode_path = "F:\\Dokumen\\Target\\Develop Apps\\addon_blender\\tes"

I have 3 videos :


file1.mov 
file2.mov
file3.mov


I hope, when i click this button : 



It will insert all videos from episode_path. But, i have a problem. When i click the button, it always show error :



Maybe you can help me, What did i miss? 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

@cmomoney @sambler Thanks for your answer guys. Finally, i can finish my first addon in blender. I add this in execute function :

def execute(self, context):
        episode_path = bpy.path.abspath("F:\\Dokumen\\Target\\Develop Apps\\addon_blender\\tes")
        episode_list = os.listdir(episode_path)
        episode_sort = sorted(episode_list)
        first_frame=0
        last_frame=0
        for v in [f for f in episode_sort if f.endswith('.mov')]:
            movs = os.path.join(episode_path,v)
            start_frame = last_frame+first_frame
            bpy.ops.sequencer.movie_strip_add(filepath=movs, frame_start=start_frame, channel=1)
            first_frame = bpy.context.scene.sequence_editor.sequences_all[v].frame_start
            last_frame = bpy.context.scene.sequence_editor.sequences_all[v].frame_final_duration
        return{'FINISHED'}


Thanks for your help guys
When invoking an operator in python, there are three positional arguments that are generic to all operators, all other arguments that pass settings specific to the operator must use keyword arguments.

So to call the operator you should use -

bpy.ops.sequencer.movie_strip_add(filepath=video_file)


Note that movie_strip_add will add one video file as a strip, so to add a directory of movies you will want to use a loop.

def execute(self, context):
    episode_path = "/path/to/videos/"
    for v in [f for f in os.listdir(episode_path) if f.endswith('.mov')]:
        bpy.ops.sequencer.movie_strip_add(filepath=os.path.join(episode_path,v))
    return {'FINISHED'}