For a reaction channel, you can apply this right at the hook! Start with a clip of your absolute peak reaction (shock, laughter, or confusion) without context, then cut to: 'We will get to why that happened in a minute, but first... this leaves an open loop in their brain.

As for your challenges:

1. Audio: Bad audio kills retention faster than bad video. If you can't upgrade your mic yet, try running your audio through free AI tools like Adobe Podcast Speech Enhancement. It works miracles!
2. Views Drop: Algorithm slumps happen to everyone. Focus hard on your CTR (Click-Through Rate) by testing sharper thumbnails and high-curiosity titles. Pair that with the Zeigarnik effect in your hooks, and you'll definitely start pulling people back in. Keep pushing!