I can't find air drop video on my iphone

I am having problems with the airdrop on my Iphone 6.

I have done air drop some video from iphone 6s plus (IOS 11.2.2) to my iphone 6 (IOS 11.4), they was sent successfully but I still can't find them on my iphone. I've retried 2 times but still not found, and my iphone capacity was reduced.

Where can i find them? Or what can i do with this problem?

Thanks for your support!