The double-DRK with well-timed support from DNC et al does present a bit of a challenge, but I agree with you that in the 2nd video far too many people died.
1. You have plenty of time to know red is coming (likely after their ice finished)
2. Failing that you can look at the map.
3. Failing that (if the dots hadn't populated) red is coming across a vast open expanse, and the two DRKs are marked.
4. Half the people who died are ranged! Assuming everything is on CD so no stuns etc can be dropped on the clearly-marked DRKs, just back up!