Some post-video thoughts: So I mention right at the end that my preferred way of doing things is to keep locking in profits until you get knocked out by a stop-loss. Remember that this is just my personal preference, and for me it removes a decision point - meaning that there's less pressure on me, and the choice is almost out of my hands.
This may not work for everyone, as you are always going to miss the high, and therefore lose some percentage points of profit. But trying to pick the high is, in my opinion, not possible. You never know where it'll stop, so become comfortable with selling a trade lower than the high. You need to see concrete weakness in a trade before selling out, and that means reducing profit levels.
Also, remember to give the market room to move. It's the number one mistake new traders make with stop-losses: they place them too tight. If you're not confident enough to risk 5%-10% on a trade, then you shouldn't be making that trade. If you're placing 1%-2% stop-losses all the time, you're going to get bounced out constantly and miss the rises. It's a judgement thing, and something that just comes with experience.