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Attempt 1 looks better than atempt 2, except - is it possible you have swapped C1 and C2? The scope response to the right of the Figure 12 C2 drawing looks like a reasonable video response.
The scope picture to the right of the Figure 13 C1 drawing has a peak at the sound subcarrier, 41.25, which it seems might make sense to feed the Sound-Sync amp, although the drawing doesn't show such a huge peak.
Did you replace any capacitors in the sound-sync detector area? Particularly note C22 is a very small value, 0.82 pF.
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