As for the WMV files, I transcoded them with Sothink Video Converter tp MP4.

From: WMV file: video codec MSS2, 800x600, 15 fps, audio codec WMAS, mono, 22050 Hz, 32 bps
To: MP4 file: video codec MPEG-4 Video (Mp4v), 15 fps, 480x320, audio codec MPEG AAC Audio (mp4a), stereo, 44100 Hz

Or from 5 MB as WMV to 20 MB in MP4. Much larger files, however it plays on the EE.

So far for video on the EE:
- MOV plays natively
- WMV transcoding to MP4
- some MP4 need transcoding