You can download the dataset from the link below:
https://data.4tu.nl/repository/uuid:2ac74fbd-2276-44ad-aff1-2f68972b7b51
Reference:
Hoffman, W.F.C. (Wouter); Lakens, D. (Daniël) (2019) Public Benchmark Dataset for Testing rPPG Algorithm Performance. 4TU.Centre for Research Data. Dataset. https://doi.org/10.4121/uuid:2ac74fbd-2276-44ad-aff1-2f68972b7b51