Yes it can be done you will need WebTv app for your box and to rename your m3u file to web,m3u
Firstly make sure your m3u is named (WebTV.m3u) and put to the root of your usb, Next open up WebTV on you v8s and press the green button to delete all. Then press menu and goto upgrade by usb, change upgrade mode to misc files in place of image and press select and upgrade. you then press ok on WebTV.m3u and you will see a green tick appear next to it, press the yellow button and it will start your upgrade and show that it is complete a couple seconds later. Now go back to WebTV app in the menu and all your channels will now be there.