A Liam Neeson action-thriller where he demonstrates his particular set of skills yet again tops the DVD releases for the week of May 3. “Blacklight”: Neeson stars as Travis Block, a shadowy government operative who does clean up work for the FBI, getting agents that are deep undercover out of sticky situations. “Director Mark Williams (the 2020 Neeson thriller ‘Honest Thief’), who also co-wrote the script, pays lip service to our current political climate with references to ‘the millennial soapbox crowd’ and ‘gotcha moments on Twitter,’ but it’s basically the same Neeson in slightly different …