When I first watched it, I could clearly hear the indicators at 1:16 as you join the dual carriageway, but I didn't hear them as you changed lanes at 1:26 or back again at 1:50, listening again having turned the volume up and trying to find fault with your driving, I think I do hear them, just, but you only use them as you start to change lanes, you don't give the recommended 3 flashes before starting to move! You also didn't use them at all when you left the roundabout even though the car in front did at 0:54.
I'm not criticising your driving since I can't see that using the indicators was required in any of those cases, I don't have a rear view to see what was behind, if anything, and leaving the roundabout it was obvious where you were going anyway, although indicating might have been appreciated by traffic in the next lane that might of wanted to overtake but was waiting to be sure that you were leaving the roundabout and not continuing around.
My point was just that the evidence was recorded, although if it is unreliable because it is only sometimes recorded and sometimes masked by road noise then it is possibly worse than no evidence! I guess there is a lot more road noise at 1:26 compared to 1:16, but I can't tell that by listening, only by the fact that I have difficulty hearing the indicators at 1:26.
Took me a while to find the video again, it was this one: