First, more evidences of these camps are needed. Unfortunatelly it's very hard to have concrete evidences from what happens behind the curtains in China, as it's a very closed country where the government watches everything going on very closely.
What do you think is going on with the people in the video? There are not many things that could be happening to the people handcuffed, blindfolded and shaven in the video that are not serious human rights violations. In fact, I cannot think of anything that could be happening not involving serious human rights violations.
This video solely is too little evidence for a country to act against China, although it's the first evidence of many others that can be find from now on. Keep in mind a country's government can't act like us, individuals, on the internet. They have to act strategically to not give any margins to the other side use this as an excuse to create more issues (like victimizing towards the global community).
China ambassador in UK told on the television he didn't know what was that video showing the prisioners. Then a investigation must be conducted and after some steps I'm sure some countries like US will take proper actions towards China, as Mike Pompeo has already signaled.
If there is something Trump has already let very clear is that he is totally against human trafficking, so I think he won't turn a blind eye to that. But again, more evidences are needed, so China won't have any excuse. It's needed to act on the right time!