The sale of DVDs is going the way of the PC -- both have seen their market share dwindling. In a world of instant information, streaming videos are replacing DVDs. Last year, DVD sales fell by 43% to $7.8 billion from $13.7 billion in 2006, The Wall Street Journal reported.

There is another accompanying trend that reinforces streaming videos. Customers are spending more time online. Add the multiplier of time spent on social networks and it's streaming video hands down.

Coinstar (CSTR) is, without a doubt, a very compelling stock to watch. I've been both bullish and bearish on the idea over the last several months. The one-year chart shows some fascinating price action. It makes one want to buy the name, but at the same time, I'm sure many investors wonder what the future will be like for the owner of the Redbox DVD-rental kiosk (i.e., how will it specifically adapt to the demand for digital delivery of movies?).

This week, TheFly mentioned that an analyst firm believes the stock will climb even higher, perhaps all the way to $80. That would represent a pretty impressive return based on where the quote is right now.

I'm going to offer up brief opinions on some of the events from the past trading week. Maybe you had your eye on one or two of them as well.

Playboy (PLA) reported a net loss in its second quarter. The red ink came out to 16 cents per share this time around; last year, the loss was 26 cents per share. You know what? It doesn't really matter if management was able to narrow the bleeding. Playboy is purely an arbitrage play now, with Hugh Hefner making a bid to take control of the business (a competing bid has been made by FriendFinder, which owns Penthouse). I would avoid making a buy here, since the arbitrage game can be a difficult one to win.

Coinstar (CSTR - option chain) shares rose Wednesday after the company announced that it has extended its revenue sharing license agreement between Paramount Home Entertainment and Redbox Automated Retail, a wholly-owned subsidiary of Coinstar. If you think that the stock won't fall by too much in the coming months, then now could be a good time to look at a bullish hedged trade on CSTR.

CSTR opened Wednesday at $53.50. In morning trading, the stock hit a low of $52.30 and a high of $54.76. As of 12:15, CSTR was trading at $53.17 up 0.67 (1.3%). The chart for CSTR looks bearish.

Blockbuster (BBI) is not a stock any sane investor should buy. First, it's under a buck. Second, it is currently down over 20% in afternoon trading, backed by significant volume. I'm seeing a price of just under 40 cents as I write this. Not a good situation.

Yet, I'm sure there are a fair amount of professional speculators out there making bets on the business. Hey, I can't predict the future, but I just don't see how anyone can take a chance on the shares. The one-year chart is terrible. And the most recent earnings report, released yesterday after the bell, is likewise a horrible sight to behold.

Let's have a look at a few earnings reports from earlier in the week. We'll check out two businesses operating in the arena of consumer products -- Colgate-Palmolive (CL) and Procter & Gamble (PG) -- and one that is prospering from a crimson DVD-rental kiosk that has become all the rage -- Coinstar (CSTR).

We'll start with the latter concern first. Coinstar was one of Friday's great stock stories. It shot higher by 16%, backed by an incredible amount of volume. Investors are apparently counting on this one to go even higher. In fact, some analysts believe that the shares may eventually reach $60.

I'm going to take a brief look at two quarterly reports from the past week. We've got a popular restaurant chain on the menu, as well as a DVD-rental business that is causing Hollywood a lot of headaches.

The Cheesecake Factory (CAKE) reported flat sales revenue in the fourth quarter. And when I say flat, I mean it: $400.6 million versus $400.4 million. On an adjusted basis, net income was 28 cents per share, representing an increase of 87%. This was four pennies ahead of estimates.

On Tuesday evening, I took a different route home than usual, and drove past my local Blockbuster (BBI) store. It was hard not to notice the brand new "Store Closing" sign, and my carpool buddies and I briefly discussed the stiff competition the chain is facing from Netflix (NFLX) and smaller rival Redbox.

Well, in light of last night's updated fiscal-year outlook, I'm beginning to think I may have witnessed a real-life bad omen (feel free to email me for your own psychic reading). After Wednesday's closing bell, Blockbuster confessed that its preliminary fourth-quarter and full-year results were unexpectedly weak -- and as a result, shares of the penny stock are slipping ever closer to theoretical support at zero.

Netflix, Inc. (NFLX) is trading down today. Looks like investors aren't in the mood for the stock just before the new year begins. At the time of this writing, shares of the online DVD-rental concern were off by nearly 3%.

Kind of sad, when you think about it. Netflix is up big on the year. It was a great story of capital appreciation: buy the dips, and you made out. Whenever you thought the company was about to head into a downturn, it ended up proving you wrong. When things seemed just absolutely awful, like they did back in the first quarter, Netflix was resilient in the face of financial adversity.

Blockbuster (BBI) is a terrible company and stock. After perusing the third-quarter report, published Friday after the bell, I don't see any reason to modify such a rough statement.

Sorry about that, but what else can I say about a huge revenue decline and a wider loss coupled with a story that continues to deteriorate? According to the Q3 earnings release, Blockbuster experienced a 21% drop on the top line. On an adjusted basis, the company lost 20 cents per share, compared to 9 cents per share in the comparable period a year ago. Helping to drive this abject performance was a 14% contraction in same-store sales.