Which cells are source mistakes?

The video marks r3c2, r5c4, r5c2, and r3c5 red; the clean route uses r2c3, r7c2, and r3c6 instead.

What is the final Level 5 placement?

Place the cyan-blue cat at r3c6 after r5c5.

Zoodoku level guide

hard 8 colors

Zoodoku Level 5 is an 8x8 board with a seeded orange cat at r1c1. The clean route is r6c7, r4c8, r8c4, r2c3, r7c2, r5c5, then r3c6.

If the player asks you to sign in, open the video on YouTube instead.

Preserve the seeded orange cat at r1c1.
Place the pink singleton at r6c7.
Place the brown singleton at r4c8.
Place the green singleton at r8c4.
Place the purple-region cat at r2c3; skip the source's red-error r3c2 probe.
Place the slate-blue-region cat at r7c2; skip the red-error r5c4 and r5c2 probes.
Place the yellow-region cat at r5c5.
Finish the cyan-blue region at r3c6; skip the red-error r3c5 probe and wait for Unbelievable.

Colors in this level:

Orange, Purple, Cyan-blue, Yellow, Slate-blue, Brown, Pink, Green

Tapping r3c2 instead of r2c3 creates the first red error in the source.
Tapping r5c4 or r5c2 instead of following the later r7c2 slate-blue landing creates two red errors.
Tapping r3c5 instead of r3c6 creates the final red error before the cyan-blue cat is placed.

Resolve the three singleton territories first at r6c7, r4c8, and r8c4, then use r2c3, r7c2, r5c5, and r3c6.

Board notes 5 details

Layout: Orange is the seeded singleton r1c1. Purple covers r1c2-r1c6, r2c1-r2c4, and r3c1-r3c2. Cyan-blue occupies the upper-right and right-side lanes: r1c7-r1c8, r2c5-r2c8, r3c4-r3c8, r4c6-r4c7, r5c6-r5c8, r6c6 and r6c8, r7c7-r7c8, and r8c7-r8c8. Yellow covers r3c3, r4c1-r4c5, r5c4-r5c5, r6c3-r6c5, r7c3-r7c6, and r8c5-r8c6. Slate-blue covers r5c1-r5c3, r6c1-r6c2, r7c1-r7c2, and r8c1-r8c3. Brown is r4c8, pink is r6c7, and green is r8c4.
Goal: Keep r1c1, then fill the pink, brown, green, purple, slate-blue, yellow, and cyan-blue territories at r6c7, r4c8, r8c4, r2c3, r7c2, r5c5, and r3c6.
Opening: Only the orange cat at r1c1 is seeded; no opening X marks are visible before the first player tap, and all three hearts are full. The source later shows red errors at r3c2, r5c4, r5c2, and r3c5; these should be omitted from a clean solve.
Danger Zone: The four source probes r3c2, r5c4, r5c2, and r3c5 are red errors. The correct purple, slate-blue, and cyan-blue landings are r2c3, r7c2, and r3c6.
Mechanics: This 8x8 board has eight total territories, one opening anchor, three singleton targets, a large connected cyan-blue lane, and four visible red-error examples before the two-heart Unbelievable finish at 82.3%.

Where is the only seeded cat in Level 5?
The orange cat starts at r1c1.
Which cells are source mistakes?
The video marks r3c2, r5c4, r5c2, and r3c5 red; the clean route uses r2c3, r7c2, and r3c6 instead.
What is the final Level 5 placement?
Place the cyan-blue cat at r3c6 after r5c5.