Prior Minecraft 1.9.4 the loading screen really sucked and didn't tell you much. This mod for 1.7.10 and 1.8.9 gives you a nice progress bar and explains adequately what phase the modpack is during the load process.
You can get it at https://minecraft.curseforge.com/projects/better-loading-screen
I'm the original author this video. It was posted under my identity Kreezxil on Youtube.
