That's the way I do it when I don't have the ss mesh.
I watched the same video before I got it. But I wrap the coil a little wider than normal to be able to fill the holes on the side.
I'll have to pay attention when I take it apart this evening. I have the authentic and I watched the video before I did my first build and I've only had it leak once but I used a 3 ml piece of ekowool and no flavor wick. The cotton shoved in 2.4mm coil seems to be doing well, no leaking- yet. Lol
The ss mesh with flavor wick worked like a charm but silica bugs me for some reason.
I also have the authentic. I think their channel holes (the hole where your wick comes out) is much larger than the clones. The clone manufacturers took the original design and tweaked it, making those holes a tad smaller.
My leaking was very mild and rare. Any leaking to me is too much. So I fixed it.