Google AdWords rejected Interactive Templates with unsupported file types

The reason is likely due to Google's incompatibility with some .mp4 files.

Possible solution:

• The following workaround might help:
  1. Delete .png, .wolf2 files that do not occupy much space (~5 bytes).
  2. Convert .mp4 files to Base64.
  3. Remove inline references to those deleted files in index.html.