It isn't that easy to tell from the photos or video... In her favour, I did note in the video that she does seem to have a defined "tummy tuck" - which is good. And whilst she doesn't look exactly fat in any of the photos, I couldn't discern the presence of ribs just by looking - and one should be able to see the last couple of sets on a boxer, when they're just standing normally. I don't see defined muscle either, suggests that it may be obscured by fat (however, this isn't that definitive in your dog's case, as she's an adolescent and one can't expect to see the full adult musculature).
In terms of physique, it's worth bearing in mind that this is a breed that is supposed to be lean - think muscles on skeleton like a (heavily built)greyhound - rather than layers of flesh obscuring the frame (like labs, for example).
Notwithstanding all that, two things stand out to me in your post that suggest that you DO need to look at your dog's weight. First, people have commented on her weight (and generally, people don't if the dog is only slightly overweight - they comment when its definitively overweight). So that's something worth listening to.
Second - the height/weight you posted. My dog is about the same height as yours, has quite good 'bone' (meaning he doesn't have a dainty frame) and he's not an 18 month old adolescent (meaning he has his full adult musculature). And at 32kg, which he has reached on a few occassions over the years, he is clearly overweight. An ideal weight for my dog is 30-31kg. It seems hard to conceive that an adolescent bitch of similar height, but weighing substantially more than an adult dog, is not a bit overweight.
Thus, whilst the pictures aren't definitive, I think the above two points would tend to indicate to you that there's good reason to look at reducing her weight a bit.
Another thing I think you should bear in mind is that your dog is now past her skeletal growth phase. And that almost always means that she needs LESS food now than she did when she was still a growing puppy. When she hits about 3 years old, she'll probably need a further reduction. And another when she reaches middle age (say about 5-6). As an example, my guy was eating about 1.1 kg of raw food daily from about 5-6 months old through till about the 18 month mark. That gradually had to be tapered back. LOL - I mentioned that he hit about 32kg several times in his life (he's 9 now) and on each occassion it was a reduction in the amount of food he was getting that was needed. He is an active dog - gets a good 3-4 hours a day of hiking and running about - so "more" exercise wasn't so much the requirement in his case, I was just plain overfeeding for his needs. And that's really the key to it all - feed to match the dog's needs (remembering that those needs WILL change at differing life stages). He currently gets about 800g per day (which is substantially less than the 1.1kg he was getting as a puppy!), but which has been stepped down in stages, as his needs have changed. Of course, depending on your dog's lifestyle, additional exercise may also be needed (I just don't know if she gets 30 minutes or several hours good running exercise daily - so will leave it to you to decide if more is needed).
