Can anyone help 'reinstall' Bluetooth?

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Bluetooth doesn't automatically come with Notebooks/Laptops but those that do have it show as part of the Wireless/Wi-Fi adapter, built-in, and has to have drivers installed. Some Notebooks have a physical switch to turn it on before Windows loads or maybe an Fn + another key to do it.

Most Desktops don't include it, my ASUS from 2 years ago did as a separate card [which I had to remove to put in a different card].

Most Tablets do have Bluetooth so one can use such keyboards and mice plus transfer capability.

If a Desktop doesn't have the adapter a USB Bluetooth dongle can be acquired to gain that function but still needs drivers that may come with it or download from the vendor's site.

Hello Neil,

What brand and model number is your motherboard, or PC if an OEM?

This way we can look up its specs to see if it includes Bluetooth support or not.

Do you know the model number of your HP desktop?

HP Desktop PCs - How Do I Find My Model Number or Product Number? | HP Customer Support

Looking at your PC's specs and drivers at HP below, it doesn't appear to include Bluetooth.

HP 110-302na Desktop PC Product Specifications | HP Customer Support

HP 110-302na Desktop PC (ENERGY STAR) - Driver Downloads | HP Customer Support

You should be able to directly connect the Android to your computer via USB, open the "This PC" on the PC to see the Android listed like a drive, and copy over the video files from the Android.