I'm a bit late to the party on this one, but based on the video I'd say you might want to plus up on the burrow diameter. You look to have a full grown Peacock mantis and they are a bit on the chunky side when full grown.
The pipe is fine right now, but when he molts he'll have to jackknife inside the pipe and if he can't he will get stuck inside the old shell and die. I checked and see that 68mm is about 2.67 inches and even that might not be enough. I'd recommend a 3" (~76mm) pipe diameter for a full grown Peacock. He will fill the interior with gravel and rock to suit him if it's too spacious.
I'm sorry, I know that's a ton of work to rip out and replace PVC. Otherwise all looks good man, enjoy!
The pipe is fine right now, but when he molts he'll have to jackknife inside the pipe and if he can't he will get stuck inside the old shell and die. I checked and see that 68mm is about 2.67 inches and even that might not be enough. I'd recommend a 3" (~76mm) pipe diameter for a full grown Peacock. He will fill the interior with gravel and rock to suit him if it's too spacious.
I'm sorry, I know that's a ton of work to rip out and replace PVC. Otherwise all looks good man, enjoy!