My jvc vcr is plugged into my new mitsubishi DLP tv and the image is jumping up and down a bit. It also seems to skip a few frames, why is that?

You might try to clean the heads, You can buy some acetone at any walmart, Kmart ect…Use a foam swab to clean the heads on the chrome cylinder that spins. (Do not use cotton swabs, it will get caught in the heads.) It has 4 small windows on the cylinder that are the record and play back heads. Do not use a lot of acetone at one time, just a bit. Let it dry for 5 to 10 min’s. Then try to record and play back something. Sometimes it takes more than one cleaning. But.. Always let it dry good before putting in a tape or it will clog the heads worst. I have found that cleaning tapes only work if the heads are not very dirty. A manual cleaning is the best. Radio shack may carry the foam swabs. I’m not sure but electronic supplies do. Hope this is helpful.