Even the video you link claims to be 'bullish' on production. I didn't see any claims about price in the future, just production, though I might have missed it.
In my opinion, we're seeing a lot of 'whiplash' effects from the supply chain issues but, as the pandemic recedes, these should resolve in the next couple of years.
[0] https://www.thesolarnerd.com/blog/will-solar-get-cheaper/