A consistently under-used ad type on Amazon: Sponsored Brand Video on competitor product targets.

They won't work well for every brand, but if:
- SP competitor targeting drives a lot of volume for you
- Video performs well for you

I recommend testing them out.

The targeting is simple: bid on the competitor targets that convert well in SP.

Suggested bids can be high on these campaigns, so I recommend bidding lower.

See if you can get traffic at bids that are more in line with your SP CPCs.