"Video unavailable. Try playing something else."

I have these short social media videos on our site, they're uploaded to Squarespace (not linked to Vimeo like most of my other videos) and they all seem to work fine on my computer. On my phone (droid) however, it sometimes allows me to play the videos and sometimes the block goes black and it says "Video unavailable. Try playing something else." and I cannot play any of them. Any ideas why this would be happening?

Have you tried reporting this to Squarespace Support?

https://support.squarespace.com/hc/en-us/requests/new#choose-topic