Yes, seems that viddler changed their oembed endpoint, and the redirection from the old one is stripping the maxwidth.
I made a core ticket about the issue:
http://core.trac.wordpress.org/ticket/24296
Yes, seems that viddler changed their oembed endpoint, and the redirection from the old one is stripping the maxwidth.
I made a core ticket about the issue:
http://core.trac.wordpress.org/ticket/24296