I also ran into that issue the other day. Did you file a feature request for that? If you didn’t I will. In general though I really like Moshidon. The video player functionality I want is not available in any mastodon client app except for Fedilab technically, but its implementation is still very primitive for now.
That’s funny, my phone is kinda small so I had to scroll that horizontal menu with the download button, over to the right to access that button 😆 Thanks for the screenshot