A:AnswerI personally found this laptop to be lacking a bit of power when it comes to editing videos. The reason being the screen is said to have high resolution, but I didnt feel it was as good as some other laptops. However the blacks on this laptop were very solid. Brightness can be an issue also.
As for editing videos, video editing takes up a lot of resources for the computer. This one has a decent amount of RAM and storage but you might still find it difficult to run something like Davinci Resolve and a photo editor at the same time.
A:AnswerYes it can be added. However, it would need to be added externally. There is no room within the laptop to hold space for one to be added inside.
External burners can be thin and be carried along with the laptop.
A:AnswerYes they can hear you. You need to make sure that your mic is set to use the Bluetooth headset and not the built-in mic. Normally the computer does this automatically when you connect the Bluetooth device. If it hasn't been done, you can check by going to the icon in the system tray on the right side of the task bar. Click on the little speaker and go to troubleshoot. Follow those instructions.
You can also check on this by right clicking on the same icon and checking out sound settings.