The iFaith project takes us through the entire Bible. From each book of the Bible are produced 1 or 2 video sermons. All talks are 15 minutes or shorter, and are suitable for viewing followed by discussion. Yet they may also make a good introduction to the Bible as a whole. Click on the link above to see the entire plan.
In all, there are 120 messages. To visit the Youtube channel with all the video sermons (only), click here. For the audio (only) recordings, click here.
The second series is on the Sermon on the Mount. For these 26 videos, click here (and scroll down).