Hi @koxigru welcome to the community!
At the moment when you use the redirect function it will open in the same tab so you’ll then leave the videoask, opening a redirect in a new tab is on our feature request board so I’m going to add another +1 to the request.
In the meantime, you could add the link to the dropbox file in the overlay text of each step so a respondent has access to the file link without leaving the videoask.
Hope that helps but let me know if you have more questions 
Hi Grace,
Thanks!
It seems that I can’t make any hyperlink, either in the overlay text or in the end screen, except if I just copy the url, which is a bit messy. So, yes, opening a redirect in a new tab would be a nice addition! Or allowing a small text above button(s), with the ability of adding links.
Have a great day!
Hi @koxigru yep, hyperlinks for overlay text is also a current feature request! Will pass all this on to the product team for sure, thank you for your feedback
Sometimes we use link shorteners to make link sharing a bit cleaner in the overlay text, but would definitely be awesome to be able to add links to the buttons!
Have a great Friday!