Yes. The most obvious interference will be that the 802.11 ethernet packets will produce white horizontal lines and a click noise every few seconds, if the 802.11 channel overlaps the video frequency. This is when the frequency hopping signal happens to coincide with the video transmission for a few line periods. Normally the effect isn't too annoying, and tends only to happen if the video receiver is within 50 feet or so of the access point or a client. You may also get interference from the phone to the video, which would slightly degrade the image. It's unlikely the video will interfere with either the phone of the ethernet, as both are digital links with error-correction of various types. The ethernet bandwidth may drop a bit, though.

If this happens, your best bet is to try switching channels on the video system (there are normally 4 available) to put it as far away as possible from the 802.11 channel. Note that although there are from 11 to 14 channels available for 802.11b/g these only correspond to 3 separate frequencies.

The only other choice is to either use 5.8GHz 802.11a ethernet, or 5.8GHz video senders. Both are more expensive, but 802.11a has more bandwidth, and 5.8GHz video seems to produce a better picture presumably due to increased analog bandwidth as well.

pca