It is appreciated. There is an awful lot of work which needs to be done on the filters, and doubtlessly many bugs. A VirtualDub's filter that that only averages pixels in a configurable radius around a source pixel that are within a configurable threshold of the central pixel. This has the effect of blending low-level video noise while retaining sharp details. Threshold can be anywhere from 0 to 255, and defines the maximum difference between a source pixel and a surrounding pixel in which the program will attempt to average the source pixel with the surrounding pixels.
Higher thresholds blend more.
The default is 12, which seems to work well for most of my video sources, but I highly recommend experimenting with different values to find the perfect match of removing noise and retaining details. The interlaced video option when checked processes the video as if it were interlaced. This means there is no attempt made to blend between even and odd scanlines. This keeps interlaced motion intact for those who are targeting full resolution interlaced video sources such as DV .AVIs or interlaced MPEG-2. If the video file you are dealing with is not interlaced, or under 288 pixels in height, it is recommended you not enable this function.