If you're only here for Chechclear and OFEX, they're at 34:45 and 40:08, respectively.

Other executions are featured at 21:59, 22:41, 39:13, 39:42, and 43:16

Thanks @I_farted for giving tips on where to find it and @hawtdoq for ghost-writing most of this post.

If you don't want to go fullscreen to get rid of the confetti here's the video again down below:

The name of this documentary is "Чечня ХХ век. Террор." or "Chechnya 20th century. Terrоr." It was released in 2002. Every copy of Chechclear and OFEX that has ever been uploaded to the Internet was in all likelihood derived from this documentary. While longer versions of both these videos exist, whether they were ever uploaded to the Internet is unclear and a gigantic rabbithole that's already been explored for both Chechclear and OFEX. If they were uploaded at one point, these versions have since been lost and buried for decades.

Here's a detailed summary of this documentary and all that it holds:

The documentary starts with a dramatic intro, after the around 3 minute long intro, it switches to a (What I assume to be) a trаining exercise where the Russian troops are bounding from one hill to another while firing down on positions marked with smokes, most likely to mimic enemy positions. After that, at around the 7 minute mark, the cameraman follows Russian troops through a mountainous forest area, where they can be seen slowly traveling around while also setting up positions for short periods of time in order to clear the sorroundings before moving on., they then cross a river area and the film cuts.

For the second part of the film, they show what I assume to be a Chechen rally, I do not speak Russian but if any Russian speaker would be able to trаnslate / help in understanding in the replies it would be added here and greatly appreciated.

14:55 : We are shown a group of Chechen militants, possibly the ones that are in the upcoming gore videos mentioned.

14:58 : We see a prisoner, which a few seconds later gets his fingertip sliced off.

15:40 : We see either a mechanical failure or an attack on Russians, as an explosion goes off (Possibly a grenade) inside of a Russian military helicopter with gunshots around it, the bodies of the people that were rescued are shown afterwards, some charred to the bone, aftermath starts at 16:23.

16:35 : We see Russians showing off a bunch of weapons, possibly captured ammo caches and money, along that we see 2 starved men in a room, possibly captured Chechen militants that were abused or Russian prisoners.

16:42 : We are shown 2 bearded men, most likely Russian soldiers that have been starved and pretty much look dead.

16:44 : We are shown multiple people, which I assume are pictures of the people in the first picture except for the man without a beard, and after the pictures we see a man getting kicked in the head multiple times.

17:06 : We see a man which I assume to be a Russian filmed for propaganda purposes, bleeding from his head and with a black eye.

21:53 : Chechen rebels can be seen placing people which I assume to be civilians (Due to the fact one of them is a woman) up against a wall along with a flag of the Black Standard. They then magdump the 2 civilians.

22:36 : We are shown a man that we saw earlier with the other Russian prisoners cowering, at 22:41 we can hear a loud bang, followed by him falling down, so we can assume that he was executed.

After this, a messy room can be shown along with what might be the same guy sitting in a corner.

22:55 : Chechen rebels can be seen cutting a finger off of another Russian prisoner.

23:04 : We are shown the heads of 4 British & New Zealander workers that were kidnapped and executed

For the context for this photo and speculation about the people in/behind Chechclear, check this video out:

Remember, this is all speculations so take this with a grain of salt, but this is the best information we have on the identities of the people in Chechclear, the identities of the 4 beheaded men are confirmed by the man in the documentary.

26:29 : We are shown the result of a bombing in what I assume to be a bus stop, the entire place is in ruins and many dead bodies can be seen while others try to rescue the injured on carts.

27:55 : We see dozens of dead bodies, I can hear the man say "terrоrists" so I can only assume these are either the victims of a terrоrist attack or the bodies of Chechen militants. Most likely the former.

28:07 : We are shown a video filmed by Chechen rebels with a nasheed in the background, showing the bodies of multiple dead soldiers, judging by their appearance I assume that they're Chechens.

28:42 : We are shown a decapitated head and the body, a different soldier that was most likely executed by Chechens, and a third soldier which has his pant area completely torn up so I can only assume he was blown up, a few seconds after we are shown the head of another Russian soldier with a massive hole, his brain can be seen leaking out, next to him are many more bodies, one of which the cameraman zooms into, showing that he had his throat cut by militants, we are then shown the once again completely torn up man along with a few more bodies.

29:45 : We see what is most likely a dead Russian soldier, starved so badly that you can see his bones popping right through his skin.

32:45 : We are shown footage from inside of the cockpit of a Russian helicopter, and then footage from the outside and inside showing rockets being fired towards Chechen rebels.

We are then shown all of the prisoners we discussed before, along with a longer clip of the black and white bearded man, showing that he had a gun put up to his head, proving that he was indeed shot in the head

And then 34:45 we get the famous Chechclear clip.

We are then shown all of the clips we discussed before of killed Russian soldiers as a sort of recap.

37:00 : We are shown 3 captured Russian soldiers and after that we are shown a body being dragged along with dead dogs, the dead body is most likely one of the soldiers we were just shown.

38:18 : We are shown a clip of a dead Russian soldier being thrown into a hole.

39:13 : We see an extremely shitty clip of a man being executed by a pistol, luckily it stops bugging out as soon as he gets shot.

Quickly after they can be seen playing around with the body of another soldier where he can be heard screaming in agony, seconds after another soldier is executed by gunshot.

39:55 : We see another Russian soldier, seconds after he gets his hand shot by a pistol.

Then at 40:08, we get the famous OFEX Clip.

43:16 : We are shown the beheading via axe of a kidnapped Russian officer. This execution has another version, which is longer, that has been featured in another Russian documentary.

44:44 : We are shown the body of a dead Russian soldier, after this it cuts to the bodies of 3 other Russian soldiers that were killed.

P.S: You won't believe where the hell I found the highest-quality version. Some madman decided to upload a DVD rip of the documentary onto a fucking pornsite. I have 0 clue why.