Lee,

Not exactly what you asked for but just from tests we have done in the past, you may want to try this first:

Post both on the outside (providing it fits your artwork etc) and at the top of your members area that for the month of 'X' there will be a new movie added every single day, if you have a 'global content area' add 1 movie for each of the 5 best niches you cater to in rotation [not 5 in one day]

Personally we found that to retain far better for that month than adding a plugin....plus you then own that content to use elsewhere later.

As for feeds I'm sure others will recommend what they find works at the moment, we haven't used external feeds in over 2yrs now as we found access problems with the ones we did use caused more harm than good.