FP pulled a lot of the same vidcaps I did, so I won't go over what she already posted.

In terms of who is on each tribe post-swap, the ones for which we have direct evidence are:

MANONO: Alicia / Christina / Jonas / Leif
SALANI: Jay / Kat / Kim / Michael / Sabrina

FP speculated that Tarzan might be on new Manono because he is seen standing next to Christina on one sequence, but we also have the shot of him apparently on the Salani waterball bench. Conflicting info for me.

Since there are bound to be multiple heats, we should not assume that the individual shots come from a 4x4 of the players sitting out the 3x3. With that in mind, it's worth trying to identify as many of the groupings first.

We have a shot of Bill (no buff visible) against Colton/Troyzan and one other person, probably male. FWIW, this vidcap looks to be flipped. Bill's tattoos are on his left arm, while both Colton and Troyzan wear the yellow plastic bracelet om their left wrist.

In this vidcap, we can see four different men: Colton, Jay, the one holding Colton, and the one behind the Colton grouping.

In this vidcap, which is a few frames further on the one of Leif with his wedding band, we can see the shape of the right arm of the person holding him. He also has a beauty mark, so it may help for comparison.

In this vidcap, we see Jay running. It could be part of the same sequence as when he falls on Jonas, but they are not edited together. The salient point is that there is an arm, which looks to belong to a woman, on the left part of the frame, reaching over to him. That would suggest that Jay takes part in at least one heat where at least one Manono woman takes part.

Since the group at the back of the 3x3 action is just not clear enough, it may be worth checking the relative heights to determine where the rest of the players are situated. With that in mind, I tried to get a better working close-up of the Salani and Manono benches.

Unfortunately, the men were crouching during the balance beam challenge, so there's no decent comparison of heights of them in bathing suits. The following line-up at the E2IC mat will have to do.