I didn't think about any insect, because they are too small.
As
@JMartJr pointed out, we don't know the size of the main thing in the 1st video, other than it's not microscopic, and it's probably much less than 1 metre (39 inches) in size (as we have an approximate idea of the size of the road vehicles).
If we are trying to estimate the size of something which is unidentified (we don't know what
type of thing it is), saying "...they are too small" to be something makes no sense: We don't know its size, and we don't know its distance.
It is based on an assumption of size for which there is no evidence, and potentially prevents us from considering explanations that might be objectively true.
Besides, the proposed "very fast and unusual speeds" may be only in theory, so not true, because if they are closer than they appear, then aren't really so quick as we thought initially.
Agreed, the video probably doesn't show anything moving improbably fast.
For a given arc traversed in a given time, the further away an object is, the faster it must be travelling*. But there is an upper limit for the object(s) in this video; they are being videoed against the backdrop of the ground, and they must be closer than the ground is.
If (and that's a very big "if") we
assume the object is at approx. the same distance from the camera as the birds that are seen flying from right to left (from about 2 minutes 13 secs. into the 1st video), it is clearly moving faster than those birds.
But not many multiples faster- maybe 3 or 4 times as fast? (Admittedly a
very rough estimate).
Mystery object circled in green, birds in orange and yellow, from approx. 2 mins 13 secs into video, approximate times in filename-
I've posted them as thumbnails so readers who aren't interested don't have to scroll through a lot, click to enlarge:









And we don't know how fast the birds are travelling, perhaps low tens kph:
External Quote:
Some birds fly faster than others but, in general, most bird species have an average flight speed of 15 to 20 miles per hour.
...However, if those same small birds get chased by a predator or catch a tail wind during migration, they can move at 30 or even 40 miles per hour!
https://www.birdzilla.com/learn/fastest-flying-birds/, BirdZilla website, "Fastest Flying Bird Countdown: 10 Fastest Fliers (Worldwide)", their emphasis. The 15-20 mph, 24-32 kph figure seems a little low to me. The article then lists fast-flying birds, some of the top speeds quoted might be over-generous.
Wikipedia, "List of birds by flight speed"
https://en.wikipedia.org/wiki/List_of_birds_by_flight_speed says the highest confirmed speed of any bird in horizontal flight is 93 mph (150 kph) for the Saker falcon, which lives in Eurasia but not South America.
If we give the birds a speed of 40 kph, the object- if it's roughly the same distance from the camera- might be travelling very, very approximately at 120 kph, almost 75 mph.
Maybe toward the upper end of a very fast bird in level flight (unlikely) or a piece of windblown debris- we are, after all, looking down into a steep-sided valley; local gusts might exceed the prevailing windspeed for the area.
If the object is moving 4x the speed of the birds, then 160 kph, 99.5 mph.
If the mystery object is significantly closer to the camera than the birds are, which might be the case here- the birds do not change their reasonably straight flightpath because of the object- then it might be travelling at much less than the perceived (estimated) speed of 3x that of the birds.
If the object is close to the camera, it might be an insect or windblown seed, out-of-focus, reflecting sunlight and travelling at a relatively low speed.
The Skinwalker Ranch (TV series) claim of filming a huge hypersonic UFO has already been mentioned. I haven't found a thread dedicated to it here, but it is mentioned in the thread "
Skinwalker Ranch - Laser Beam Stops and Starts in Mid Air".
The claimed huge, hypersonic UAP was
a fly (or very similar insect) flying close to the camera.
- The high speed camera expert actually suggested it may have been a bug or a bird. Travis immediately jumped to hypersonic UAP.
- In the review session the next day Travis was still pushing the hypersonic UAP theory.
- Travis addressed it in the final episode of the season, which was a recap episode that (given the content about whistleblowers and the dates of news articles shown on screen) had been produced months after filming ended and after the hypersonic fly episode had been publicly aired where it was obvious to everyone it was just a fly.
I'm fairly sure there have been posts on Metabunk discussing claims of door camera footage showing UFOs, featureless points of light/ orbs flying across the field of view; almost certainly the cameras videoed small insects flying around nearby. Out-of-focus insects have appeared to be spherical orbs (IIRC).
The original claimant/ poster of the YouTube videos in the OP is YouTube user wanzamhobby Drone.
He has made a number of videos taken from drones in this area. I think the scenery and some of the filming is impressive.
But if you watch, there are "mystery objects" in all his videos taken in this area. Whenever wanzamhobby Drone goes looking for mystery objects he seems to find them.
Watching the videos it isn't too difficult to see unidentifiable, fast-moving objects that wanzamhobby Drone hasn't noticed (or at least doesn't comment on). With some we eventually notice fluctuating changes of brightness that might indicate a bird's wings flapping (and some undoubtedly are birds), others we don't.
It is possible wanzamhobby Drone isn't a particularly unbiased, dispassionate or even reliable witness:
For example, one video posted c. July 2025 has the YouTube description
"
WE DISCOVERED ALIEN PAINTINGS AND WERE ATTACKED", though I don't think they discover any alien paintings and they weren't attacked:
Source: https://www.youtube.com/watch?v=ss4f42s9D4Y
Unidentifiable lights which wamzamhobby Drone doesn't mention can be seen several times, e.g. at 22 mins 55 secs, 23 mins 04 secs, 29 mins 06 secs; I've indicated where to look on these thumbnails (click to enlarge).
At about 23 mins 6-7 seconds a blob rapidly crosses the field of view, a bit like the main object in the OP but travelling from top to bottom
wamzanhobby Drone doesn't comment on it.
Note:
It isn't completely clear, but it might be possible that wamzanhobby's companions are also flying drones at the same time;
from approx 29 mins 0 secs into the "Alien Paintings" vid he says something like "...Ronaldo [Renato?] is also there with his FPV...", and appears to praise Ronaldo's fast flying,
External Quote:
while the video shows what
might be interpreted, in that context, as a drone flown by Ronaldo being filmed from wanzamhobby's drone.
Below, at 29:10, 29:13 and 29:16 into the vid:
It appears to travel fast across the scene. There are no visible propellors/ rotors/ "arms". It's a bit like the mysterious object in the OP.
I'm starting to change my mind on this one, at least about the motivation of the claimant(s). The guys
know that some apparently fast-moving, initially featureless objects can (after a brief time) be seen to be birds, but if such an object isn't eventually seen to be a bird then it must be mysterious.
And (I suspect) they know that one of their drones, filmed from another, looks like it does above: a mysterious orb (or Tic Tac?)
There are lots of birds and almost certainly lots of insects flying around. The guys are also probably filming each other's drones in flight.
I think they might be passing off anything they film that can't be easily identified as mysterious, even when (in that environment) it is probably clear to them that the "mysterious" things are very likely to be birds, insects- or another drone.
It's like a bit of immersive LARPing. So close to deliberate hoaxing as to make no difference.
There might be an unintentional clue that this is what is going on in the second video in the
OP, " "UPDATE on UFOs in SIERRA DO RASTRO";
from approx. 9 seconds to 15 seconds the presenter (wamzanhobby Drone) says, if I've heard it right,
External Quote:
It's a kind of circular movement. It's not straight. Right? Not that straight thing. Right? And it comes out of focus. Right? Because the camera won't abandon all that focus on the background and focus on the insect. See?
Despite several visits to the area, and success in filming flying objects that are difficult to identify, wamzanhobby doesn't seem to have got the interest of any scientists or local/ federal officials.
Why? Sierra Do Rastro appears to be regularly visited by numbers of UFOs, flying beneath the altitude of a hobby drone.
The traffic through the area seems fairly steady. But have we any corroborative reports of anyone seeing anything unusual?
*For a given angle of flightpath as seen from the observer's perspective.