I concur, specialise not generalise.
IMV The answer is in your question, as it often is, sell yourself as a:
"video conferencing specialist". The generalist skill set will come in handy and open up more opportunities as your career progresses.
"The Liberal Party doesn't seem so liberal" The Liberal Party (a conservative party) in Australia is big "L" Liberal not small "l" liberal. Therefore your subject line I perceive to be a non sequitur.
"The Liberal Party doesn't seem so liberal"
The Liberal Party (a conservative party) in Australia is big "L" Liberal not small "l" liberal.
Therefore your subject line I perceive to be a non sequitur.