I doubt that HT has a single VHS video tape of that morning. Most likely they have a DVR system. A DVR system can digitally record multiple cameras onto hard disk; think TiVO recording multiple cameras. The DVR may even be remotely accessible so a company headquarters could view/download store DVR data.
If you Google DVR, you'll find thousands of systems ranging from $130 to multi-thousand dollar systems. The specs may read 4-channel 120fps. Read the specs carefully because that 120fps system means it can capture 30fps from 4 cameras. But the resolution is probably 320x240 or less. Normal TV in the US (NTSC) is 640x480 or 720x480, so the captured video is actually 1/2 the resolution of normal TV. I.e. it is a WORSE picture than VHS. But because of the adjustable resolution and compression, a DVR can store much more video; just like a TiVO can store 40 or 80 hours or more.
Anyway...
Depending on the DVR system, LE can do several things to extract video evidence from a DVR. If the DVR system supports it, it can actually burn a CD or DVD of clips of the recordings it made.
Another way LE can extract the video is by connecting the DVR via S-Video or composite cable to a recorder of some sort. These companies [1][2] make video evidence collection systems that contain a laptop which LE can connect directly to a DVR system for exactly this situation.
The last way LE can extract video from a DVR is by physically removing the DVR system and treating it as computer evidence and extracting the files off the hard disk. This is a last resort as the DVR system owner is unlikely to relinquish the DVR system without a subpeona(sp?). Most likely HT has a system that LE would have great difficulty physically removing.
So, just FYI, there may be no video tape. LE may have been able to export clips from the DVR via CD or USB drive. Or they may have used a system like the StarWitness system to extract the video. Defense attorneys may be able to subpeona and extract those exact same videos in exactly the same manner.
But, then again, HT may still be in the dark ages and is still using multiplexed VHS. But as large a company as it is, I doubt it.
[1]
www.starwitness.com
[2]
http://www.salientstills.com/