I've just installed scidb, hoping that it would read my ChessBase Fritz Trainer collection.
It was able to read the .CBH files but no video appears. I don't know if that is even supported.
If it is, how can I use it ? If it isn't, how can I mimic this behavior ?
Scidb does not support videos, and I don't think that videos will be supported before the second alpha version is released. Currently Scidb is still a beta (test) version. Whether it is really possible to read the ChessBase videos - this includes also the associated timing data - is still an open question.