Looking at YouTube there seems to be plenty.
Are you saying you were keeping a rolling catalogue of online interviews and were periodically cross-referencing which ones were offline? Otherwise, how do you know they have been taken down vs perhaps there weren't as many as you think?
Here's one from an external channel:
The Assay TV: Nigel Ferguson, AVZ Minerals - YouTube
AVZ Minerals advances the world’s largest hard rock lithium project - YouTube
Here's one from AVZs channel:
Cantor Fitzgerald Fireside Chat with AVZ Minerals - YouTube
What do you think is being supressed that isn't in the above 90 odd minutes of interviews?
Interestingly, you have posted a video from an interview to your 1 subscriber channel. Why? What energy got you out of bed in the morning to do this?
AVZ Minerals - Nigel Ferguson "Full DRC Government Support" - YouTube