I don't think this is possible in Insight right now.
We have experimented with this feature before, but the problem with playing movies from the clients is that you can never be sure how quickly you will be able to get the data down the wire from the server.
The 'delay' you set between frames can only ever be a 'minimum' time between frames (the delay may be longer than you set if the data is not available).
With this caveat, we'll look at turning this functionality back on: Ticket
http://trac.openmicroscopy.org.uk/omero/ticket/4014 Will.