Fix: load background video

Fixes Issue

Closes #16

Changes proposed

There are two solutions that we can apply (if you think about a better solution, pls, share with me :))

Add image poster which will be shown when the video still loading (I chose this option)
Show the splash screen a little longer until the video will be loaded

Screenshots

https://github.com/thecyberworld/thecyberhub-app/assets/76536506/8e42904b-ae1f-4759-88fb-8f7578de662b

Note to reviewers

I chose the imageStyle opacity to be 0.9 , in my opinion, it looks better.

@kabir0x23

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th3cyb3rhub / thecyberhub-app

Fix: load background video #86