2) no sample.
There are two ways in load Video:
1) please use URL directly: you need to use the web video tag to "override" on image, and fill in your URL address in SRC of <video>.
2) use Meta: the way you should use the Meta file, and after you add URL to the meta file, you need to use the videotexture method of three.js to load video similar to the loadObject () method of load model. In short, the use of WebAR development requires knowledge of Three.js.