Depth-of-field can be controlled with aperture, focal length and sensor size. Today, most shooters control it with sensor size. In general, the larger the sensor, the shallower the depth-of-field.
Here is a chart of relative sensor sizes (your camcorder's sensor is probably 2/3" or smaller):
Generally, however, shooters who want shallow depth of field buy video capable, large sensor DSLRs, such as the Full Frame Canon 5D Mark III, APS-C Canon 70D or mirrorless DSLMs, such as the Micro 4/3 Panasonic GH3.
If you want shallow depth of field, and don't want to spend a lot of money, you can get an APS-C sensor Canon EOS M with the 22mm f2 lens for $342.
Here is what this camera/lens combination can do:
Hope this is helpful,