IMHO it is not a product of DRM. When using with such programs you should record without any compression or using a codec with low compression. On of the best codecs for this purpose is lossless codec Huffyuv. It provides very good quality, but generates a data stream of 10-15 MB/sec. Not every PC can handle such a data stream.

You may also use lossy Motion JPEG codecs: Morgan MJPEG, PICVideo MJPEG, MainConcept MJPEG. They generate data stream of 3-8 MB/sec while providing good quality.

P.S. After recording video to uncompressed format or using a codec with low compression you may convert videos to any other format using your favorite codec such as x264, Xvid,...