I am starting to get more suspension in the trot, but when does it become passage like? How much more do I need to ask for? Here's a vid of what I've started with. I think most people here know me and my horse, but if not my horse has very normal/average paces under saddle, so I'm having to create this. Also, this is the first time for me and my horse at this level, so I haven't actually felt what a correct, collected trot should feel like.
At this stage, what I'm noticing is that any wobble or unevenness is very obvious and you have to maintain it throughout the lateral work, otherwise his 'normal' trot looks very different. I may need to increase the tempo later? But at this stage, this is what he can sustain.
What are people's thoughts? Especially those that have trained at this level and above (Advanced. We are going to do a PSG test in a couple of weeks at a training day - if i can get my counting right by then

Vid (and some spanish walk at the end for Khall. We have been practising a little!)
You need to mute the sound, it was really windy and I forgot to turn the sound down when I edited and uploaded. Sorry!
https://youtu.be/LM9I8xbQ-Og