Steps to reproduce:
0) Load http://www.hetgroteongeduld.be/homehgo.html
1) Click on "Films on-line" in the top navbar
2) Choose any one "Bekijk deze films (1Mbps) / Windows media player" links from the main frame

Results:
Doesn't play.

[...]
** Message: NewStream mimetype 'video/x-ms-asf' URL 'http://www.castgate.net/grootongeduld/nsc/HGO2006Fict.asx'
** Message: Should be dual type 'audio/x-ms-asx', making sure now
** Message: Is dual type 'audio/x-ms-asx'
** Message: Is playlist; need to wait for the file to be downloaded completely
** Message: StreamAsFile filename '/tmp/etmp/mozilla/epiphany/Cache/81693B71d01'
** Message: Setting the current playlist to '/tmp/etmp/mozilla/epiphany/Cache/81693B71d01' uri 'http://www.castgate.net/grootongeduld/nsc/HGO2006Fict.asx' base-uri 'http://www.castgate.net/grootongeduld/nsc/HGO2006Fict.asx'
** Message: DestroyStream reason 0
** Message: URLNotify URL 'http://www.castgate.net/grootongeduld/nsc/HGO2006Fict.asx' reason 0
added URI 'http://www.castgate.net/grootongeduld/nsc/HGO2006Fict.nsc' with title 'empty' genre '(null)'
** Message: totem_embedded_open_internal 'http://www.castgate.net/grootongeduld/nsc/HGO2006Fict.nsc' is-browser-stream 0
** Message: BEFORE _open
0:00:02.452517000 18787 0x80730b0 ERROR                totem ../../../src/backend/bacon-video-widget-gst-0.10.c:341:bvw_error_msg_print_dbg: error message = The stream is of a different type than handled by this element.
0:00:02.452614000 18787 0x80730b0 ERROR                totem ../../../src/backend/bacon-video-widget-gst-0.10.c:343:bvw_error_msg_print_dbg: error domain  = 1931 (gst-stream-error-quark)
0:00:02.452630000 18787 0x80730b0 ERROR                totem ../../../src/backend/bacon-video-widget-gst-0.10.c:344:bvw_error_msg_print_dbg: error code    = 5
0:00:02.452645000 18787 0x80730b0 ERROR                totem ../../../src/backend/bacon-video-widget-gst-0.10.c:345:bvw_error_msg_print_dbg: error debug   = gstdecodebin.c(1548): type_found (): /play/decodebin1:
decodebin cannot decode plain text files
0:00:02.452662000 18787 0x80730b0 ERROR                totem ../../../src/backend/bacon-video-widget-gst-0.10.c:346:bvw_error_msg_print_dbg: error source  = <decodebin1>
** Message: Error: The stream is of a different type than handled by this element.
gstdecodebin.c(1548): type_found (): /play/decodebin1:
decodebin cannot decode plain text files

** Message: AFTER _open (ret: 0)
** Message: Viewer state: STOPPED

** (totem-plugin-viewer:18787): WARNING **: Couldn't load 'image-missing' icon from theme
** Message: totem_embedded_set_error: 'Totem could not play 'http://www.castgate.net/grootongeduld/nsc/HGO2006Fict.nsc'', 'GstDecodeBin: The stream is of a different type than handled by this element.'