Youtube videos don ́t work on my local Prezi

Some months ago I added some youtube videos to my local Prezi and it was working fine. Now the only way of putting those videos working is to share the link of the presentation and present with the online version, something that I don ́t want because the local Prezi is quicker. I need some URGENT support, because this is something that was working in the past and suddenly stop working. I have an important presentation this week and I have to solve this issue!