I don't know if it is Youtube still needing time to process the video in higher resolution (max resolution I can get now is 720p60 HD), or that you might need to do something about capturing settings. But on the bridge the view is awfully blocky. Also, if you can, I would suggest you increase the volume of your voice and reduce the level of the game. I had to crank up my speaker volume to the max in an otherwise quiet room to clearly hear you and still needed to concentrate.
Also, in the second video, I find it easier to read centigrads by putting the line on the mast and the scale on the waterline. Then it is usually clearer to tell the fractions of centigrads. If there is enough contrast with the water in the dark. Hard to say if it is the case here.
Otherwise nice video for a first timer.
And good to see a different kind of attack from the surface with torpedoes. Many stick to fire them while submerged.