1) The YouTube app for AppleTV is a POS, and has a reputation for not playing nicely with ATV conventions, and having issues with functionality.
2) For issues restricted to a particular app, the simplest remedy is to delete the app, and install it again. The only data lost will be that related to the app.
3) Like a computer reboot, restarting an ATV will cure most issues; in more extreme cases, a forced restart (hold the Menu and Home/TV buttons until the light on the front of the ATV flashes) is a stronger option.
4) A Reset will wipe all data and start from scratch, akin to changing spark plugs with a sledge hammer, or putting a rotary grinder to a body panel when all you wish to do is buff out a scratch. It should only be used as a last resort.
2) For issues restricted to a particular app, the simplest remedy is to delete the app, and install it again. The only data lost will be that related to the app.
3) Like a computer reboot, restarting an ATV will cure most issues; in more extreme cases, a forced restart (hold the Menu and Home/TV buttons until the light on the front of the ATV flashes) is a stronger option.
4) A Reset will wipe all data and start from scratch, akin to changing spark plugs with a sledge hammer, or putting a rotary grinder to a body panel when all you wish to do is buff out a scratch. It should only be used as a last resort.