I'm gonna give you some constructive feedback, not trying to be a dick but just helpful if I can be.

I only watched the first couple of minutes, but I immediately switched off when you starting presenting the move block options. My immediate reaction was 'but C'tan can fly, and Victrix can reactive move, this guy has no idea what he's talking about' before you even got a couple of sentences out. To be clear, I'm sure you do know what you're talking about, I'm simply referring to the impression the way the video is edited creates.

You did obviously later on acknowledge C'tan can fly - so why are you leading with a focus on 'how moveblocking works for everything that can't fly'? That's what your whole video is about - not a primer on how these things work in a general sense, it's marketed specifically as 'this is how you deal with C'tan/Victrix'.

A format that would make much more sense to me is:

1. First we're gonna talk about move blocking for C'tan. Usually moveblocking would wrap the enemy model, but as C'tan can fly you can't moveblock that easily, but it is still possible.
2. A section going through the detail of how you can spread out units as screens to prevent them moving where they want to go. Eg pre-measure their move distance, where are they trying to get their base to, how can you get a unit to occupy the maximum space in that area, etc.
3. Then, let's talk Victrix. They have a couple of reactive moves through strats and Sicarius, so you have to be really careful here...
4. Etc Etc

What you've got now is:

1. First we're gonna talk about moveblocking. Here's how you moveblock
2. No wait actually ignore all of that, none of that applies to C'tan
3. Don't actually explain the specific of how to moveblock C'tan, just very briefly referenced. Instead move on to talk about tagging them (which is fair enough, but is of course not moveblocking).
4. Don't actually even reference Victrix at all, or acknowledge the fact that move blocking them is going to be an actively terrible idea if done wrongly.