Hey, thanks for the feedback!
- As for stuff not loading, it's probably due to some file types being incompatible with what was used to create the program (untested but it's most likely the .webp format). Videos are also not currently supported - but the next update does have video support planned.
- You can already download everything; in the settings menu, there is an "auto-select posts" option which will automatically select all posts that get loaded so you can quickly download them. If you mean something other than this then I'd need a bit more information on how it'd look and work, as it would need to be able to fit into the UI without being weird/confusing.
- I will make a note to optimize the downloading process so that doesn't crash again, sorry about that!