Shakr lets you do this for free (the Shakr watermark will appear) or upgrade (and eliminate the watermark) for a modest cost (about $50). There are 200-plus templates that you can customize. Finished videos can be shared on social media.
Don’t miss the free supplements to the 2015 tax books — find them here: J.K. Lasser’s Small Business Taxes 2015 and 1001 Deductions and Tax Breaks.