This sort of fake-loader animated GIF is pretty common; it's just a slightly more advanced version of a spinner GIF. I don't think it's really that bad. What would be bad is if this page would accept a parameter to redirect you to somewhere, but it appears it doesn't do that -- it just closes itself. Presumably this page appears in an overlay that then closes itself.
We all know banks aren't trustworthy, but that's what they should be, and their goal should be actual trustworthiness and not false, theatrical crap like this.