Waste in video buying is rarely one big mistake. It is three small ones running every day.
1. Frequency stacking
The same household sees the same cut across YouTube and CTV. Each platform reports a reasonable frequency on its own, and the combined number is the one nobody looks at.
2. Stale exclusions
Placement and app exclusion lists age fast. Inventory that performed last quarter can be repackaged and resold under a new label, and yesterday's list will not catch it.
3. Untested creative cuts
One hero video carries the whole account. When drop off spikes at the same second across every campaign, that is a creative problem being paid for with media dollars.
We find these with a read only audit first, so nothing changes in your account until you approve it.