Instagram video playback problem

[felicia07]

I have an issue with my Instagram it doesn't play any video posts on the feed, but it plays most of video stories here and there.... So when I see any video posts (in the picture preview version only) that camera icon on the top right keeps flashing forever but never ends up loading the video for me! My instagram is newest, my internet is working fine like around 5MBPS....
Please help if anyone had this and possibly found a solution. Thanks