You need to have a rooted Nexus 5 with custom recovery and need to download and copy custom ROM + GAPPS in your phone's storage. I'm using AOSiP ROM from XDA Developers; [ Ссылка ]
This is an AOSP based Android 5.1.1 Lollipop custom ROM with mods and optimizations. Before you install a new ROM, take a Nandroid or other means of backup of your Nexus 5. If anything happens to your phone, I am not responsible, neither the developers.
Note: It takes some time before booting up as you saw on the video. So, don't worry or think that your device is in bootloop.
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