First, it is basic. Anyone flying a drone should always perfect manual flying skills before depending on the in-my-opinion useless flying modes. Doing this does not make you an expert, it simply helps you become adept at flying. The OP has learned some good basic skills and has shared this. Manual flying does't make you an 'expert', it simply helps you to fly more safely and capture better video.
Second, along with videos on my channel I continue to be involved in wildlife conservation using Mavic's, Phantoms and Matrices with FLIR in large part because I knew the basics of flying. I'm no 'expert', but I can fly backwards, forwards and sideways and learned to safely take off from a moving ship in the dark... Haha. I captured some of the FLIR video (shown here:
) as well as clips in other Operation Milagro videos. I am able to do so because I know the basics of manual flying, flying backwards like the OP has shown being one of them.
The OP's video is well done and it shows what anyone flying a DJI drone should strive to be able to do with a flip of the coin without using intelligent flight modes. I hope he continues to test and challenge his manual flying skills, he will be better off in the long run doing so. My two pesos...