The storage is the main problem but yeah this costs money.. but there are solutions to permanently store your videos within your own ipfs node and then they are available forever .. so I think it is time to care for the storage by our own of we don't want to have commercials on dtube :/

I have that commenting problem at work. The firewall is blocking some stuff related to the commenting function of dtube :/ so for you you could check this (if it is not at your work ^^)