As of this morning we've made some adjustments to our platform that should allow members to more easily include, video, podcasts and other multimedia in their blog posts. This had been one of the common complaints with our platform and we are working to solve it as we work towards the upcoming release of additional blog customization.
We currently don't provide a hosting service for video or podcasts, they will have to be hosted on another site, but we will explore this option in the future. To add an externally hosted video or podcast to your blog use the "HTML" button on the toolbar.
Then from the window that pops up you can insert the code to display the video or podcast, which is typically provided by the hosting service. Let us know via the feedback form if you run into problems with any types of multimedia objects and we will do our best to accommodate them.
-Matt Heaton (ActiveRain CEO)