Dude that's awesome! That's amazing growth for sure, 200k+ views in 5 days off one video is REALLYY good for a channel of your size ( your channel is slightly larger than mine BTW haha but we're both close to 10K ! We got this!). That's the trick for growing as a "new" / "up and coming" channel in my opinion, you need videos to get promoted by YouTube's algo. The best way to grow is to continue to get video's promoted, try to repeat that performance.

Here's my views in the last 6 months (over 2million) using that strategy.

You can see after the largest spike I saw a major decrease in views. This was a bit of a downer time as I was really struggling to gain traction again after that. I had to switch my content up a bit but it came back and is doing really well again. So I'd say the same thing to you guys that I had to do, if you struggle to repeat the performance of that 200k+ reaction video you made, really analyze how you did so well with that video and do your best to repeat it. Don't just do the same thing if it's not working and hope for results, really allocate your time wisely and shoot to get promoted again.

Best of luck, keep up that momentum!