Many Video Streaming portals are consumed with commercials. For the most part viewers don't mind waiting for videos that they desire to see, as long as it can be seen for free. It's usually alright to watch a commercial prior to a main video but many Broadcasters and other Media outlets have taken it to the extreme. I don't believe most users, me included, desire to wait through a commercial for every streaming video they play. With many video portals viewers have to watch the exact same commercial over and over during their viewing experience. Many viewers are probably only waiting because they have to. With some streaming video portals viewers have to wait for commercials or advertisements to play even if they rewind or advance the video one time or too many times.
This is the wrong approach. Those managing streaming video portals need to find a way to deliver commercials periodically throughout the on-line viewing experience. There should not be a commercial playing before every video but maybe every third video so on-line viewers don't become annoyed with all the waiting. Streaming video portals should allows viewers to rewind and fastforward without the process advancing them into commercial. The best way to develop the best streaming video portal experience is to view your own video portal as a visitor. This will help improve many of the on-line viewings experiences.