[html-tests] Use movie_5.* instead of movie_300.* wherever possible (#721)

movie_5.* is faster to load, so is preferable where possible. All of the
tests already also use audio_5.*, which are even smaller, so this ought
not to expose any new problems. None of the test descriptions seem to
indicate that a big or slow-loading resource is required.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/721

Received on Wednesday, 5 March 2014 17:41:51 UTC