Hanzou
Grandmaster
The issue with looking for similar video on YouTube for any aiki art, is that the effectiveness of the aiki-based movements comes at times when there isn't resistance. If there's resistance, we move to where there isn't any, and that's where the "aiki" shows up. So, if you saw me doing defensive work and I stuck to purely aiki-based technique, then it would look odd to you. I'd get someone off-balance, and move around "too much" (moving from one point where there was no "aiki" to another point where there was an opportunity for it). Even with a partner completely committing to the attack in a realistic manner, it will always look suspect.
The only time it doesn't, is if I tell my partner to use what he knows to keep me away from all the aiki opportunities. If she does that, then I feel that type of resistance and respond with non-aiki technique (strikes, Judo-style throws, etc. - all within the purview of any aiki-jujutsu based art). Problem is, it no longer looks like "aikido", because I've moved away from the aiki techniques. Then, it might as well be Jujutsu in that video. Many folks will claim that this is a better test of aikido arts, but it's actually not a realistic sort of resistance. For most techniques, I can remove the aiki opportunities by stepping with the right foot at the right time, and I can often stay one step ahead of the other person, blocking all the "aiki". But that takes a lot of knowledge, and a comprehension of those aiki opportunities, something extraordinarily unlikely to be found in an attacker.
So, I can either practice realistic resistance, giving me access to aiki and producing a video that often looks unrealistic. Or I can practice unrealistic resistance that makes me work more on the other areas of my art, and get a video that looks more realistic. We train both ways, but if you ask me for a video of aikido, well, I'd want you to see the "aiki" part.
The issue with trying to find sport evidence is largely that if you took someone who understood their Aikido well, and who had trained with resistance, they won't often go to the purely "aikI" techniques with most trained fighters, because that's the hard part to get to (and working hard to get to it is contrary to the concept of "aiki"). So, if they understand the techniques in depth, they're more likely to look like Jujutsu much of the time, so you'd not see something that "looks like" Aikido. Add to that the fact that, in most of Ueshiba's Aikido, there are fairly advanced breakfalls to make it easier to take a large number of falls (and which, frankly, make the technique look all the more impressive but are mostly done to make it easier on the receiver)...well, you won't see those same falls from someone who's actually trying NOT to be thrown (as in a competition). So, again, it won't look like Aikido. The reality will almost never look like the practice.
How about just a vid of an Aikidoka submitting someone who is trying to knock their head off or take them to the ground?
A challenge match along these lines;