The problem could well be the Verbatim media itself. Eroneously I too quickly concluded I'd fixed the issue on my SHM-165P6S drive, but the very next 16X Verbatim tried was a coaster; ditto for 8X Verbatim media, and about 3 out of 4 of either Verbatims become coasters. However, this same drive burns 8X TDK -R and 8X Ridata +R very well. This seems to indicate some drives just don't like Verbatim media even though Verbatim is regarded as high quality.
For saving video as a file you may want to consider getting a video capture card, and then use Nero or other burning software for burning. Note Nero 6 OEM Suite may be found for $5 or less from various vendors by doing a Google search.