Now of year there are many of Christmas light decorations everywhere, it's generally bokeh heaven. For that amateur, the aperture is the opening within the lens that handles light's amount that makes it through shutter and the lens to the video/alarm. Quick contacts below f/2.8 like my 20-year old manual focus Pentax-A 50mm f/1.7 SMC are ideal for filming bokeh (and is the lens I take advantage of for most of my bokeh images on Fickr). I have unearthed that the shorter the concentration distance to the front issue, the higher the background bokeh I will get.
Determined by how dim the back ground is (darker usually = better) you may have to dial in some exposure payment to really get your bokeh to really place. Next, try getting an interest of some type facing the camera at the minimum focus length (or there about) using the bokeh highlights within the background. It will have a small experimenting with subject material and illumination (both foreground and background) but in virtually no time you need to be filming bokeh such as a pro!
For your novice, the aperture will be the starting within the contact that regulates light's amount which makes it through the contact and shutter to the movie/indicator. Fast contacts below f/2.8 like my 20 year old manual-focus Pentax-A 50mm f/1.7 SMC are perfect Depth of field with a kit lens for firing bokeh (and is the contact I take advantage of for some of my bokeh images on Fickr). I have unearthed that the faster the focus distance towards the front subject, the greater the background bokeh I will get.