I sent snap chat videos now disappeared on history?

I sent a bunch of videos on snap chat and they each said "sent". When I opened the app again, they were not there on my history and all I saw were snapchats I had received earlier, so I couldn't see whether or not the videos had delivered. Later I opened the app and it appeared that one person's video was delivered. Does this mean snap chat will slowly show the videos which are delivered once it goes through? Or did it not work at all? Thank you