Disable Screensaver / Screenlock

[chadm]

Default install of LXDE 16.04

After several minutes the screen goes blank and requires password to login.

It becomes a real problem when I'm trying to play video b/c I need to move the mouse every few minutes to keep the video active.

I would like to disable this entirely. How do I do that?

[seppalta]

In menu under settings, click screensaver to get screensaver control.

[chadm]

I don't have a menu entry for screensaver under settings -

Screenshot

https://imgur.com/a/uuYaXL8

[Rex Bouwense]

I believe the application that you are looking for is your Power Manager under Preferences in the main menu. You can find the applicable adjustments under System and Display on the horizontal menu.

[seppalta]

Have a look at "power Manager" as Rex suggested. However, your image shows it in "settings".
Otherwise, install "xscreensver" or "gnome-screensaver" to get controls.

[drooly]

Default install of LXDE 16.04

you probably meant Lubuntu 16.04.

After several minutes the screen goes blank and requires password to login.

this is normal and desired behavior, but can be changed from power management settings (battery icon in tray?).

It becomes a real problem when I'm trying to play video b/c I need to move the mouse every few minutes to keep the video active.

this probably happens only when you watch your video from a browser!
for that, you need to install a small applet "caffeine" and set it up to your needs.
alternatively, find ways to watch online videos through your media player.