Anyone – and that includes me – who is online on Tisha B’Av is totally not in the position to be telling others what the right way to spend Tisha B’av is. There is zero question that Hashem would prefer someone watching some inspirational speaker over being here right now.
And, no, I don’t remember that before these speakers became the in thing that Tisha B’Av was a day of mourning, reflection and tfilla for the masses. The type of people who spent their Tisha B’Av that way are still doing so today. The masses who were not, are a lot better off having these speakers available.
Personal question for the OP, Other than going to shul and coming here to start this thread, how did you spend the rest of your day today?