In standard North American English, the R is spoken every time. If you want to sound like an American or Canadian and speak good English, you need to say the R loud and clear every time there is an R. The spelling of English is a mess, but the R is constant; if the letter R is in a word, you have to say it. If you are shy and say the R quietly, it will sound wrong. Here is the original video: https://youtu.be/rfscVS0vtbw?t=1154

A lot of students call it the "long E." I call it Notorious E. I call it that because it is one of the most confusing sounds for non-native speakers. Knowing when to pronounce this sound and how to pronounce it is critical for speaking English with the American accent. Here is the original video: https://youtu.be/rfscVS0vtbw?t=1112