diff --git a/assets/disk0/tvdos/bin/playtav.js b/assets/disk0/tvdos/bin/playtav.js
index d52b85d..d160e73 100644
--- a/assets/disk0/tvdos/bin/playtav.js
+++ b/assets/disk0/tvdos/bin/playtav.js
@@ -562,13 +562,117 @@ let trueFrameCount = 0
 let stopPlay = false
 let akku = FRAME_TIME
 let akku2 = 0.0
+let currentFileIndex = 1  // Track which file we're playing in concatenated stream
 
 let blockDataPtr = sys.malloc(2377744)
 
-// Playback loop - properly adapted from TEV
+// Function to try reading next TAV file header at current position
+function tryReadNextTAVHeader() {
+    // Save current position
+    let currentPos = seqread.getReadCount()
+
+    // Try to read magic number
+    let newMagic = new Array(8)
+    try {
+        for (let i = 0; i < 8; i++) {
+            newMagic[i] = seqread.readOneByte()
+        }
+
+        // compensating the old encoder emitting extra sync packets
+        while (newMagic[0] == 255) {
+            newMagic.shift(); newMagic[7] = seqread.readOneByte()
+        }
+
+        // Check if it matches TAV magic
+        let isValidTAV = true
+        for (let i = 0; i < 8; i++) {
+            if (newMagic[i] !== TAV_MAGIC[i]) {
+                isValidTAV = false
+                serial.printerr("Header mismatch: got "+newMagic.join())
+                break
+            }
+        }
+
+        if (isValidTAV) {
+            // Read the rest of the header
+            let newHeader = {
+                magic: newMagic,
+                version: seqread.readOneByte(),
+                width: seqread.readShort(),
+                height: seqread.readShort(),
+                fps: seqread.readOneByte(),
+                totalFrames: seqread.readInt(),
+                waveletFilter: seqread.readOneByte(),
+                decompLevels: seqread.readOneByte(),
+                qualityY: seqread.readOneByte(),
+                qualityCo: seqread.readOneByte(),
+                qualityCg: seqread.readOneByte(),
+                extraFlags: seqread.readOneByte(),
+                videoFlags: seqread.readOneByte(),
+                reserved: new Array(7)
+            }
+
+            // Skip reserved bytes
+            for (let i = 0; i < 7; i++) {
+                seqread.readOneByte()
+            }
+
+            return newHeader
+        }
+    } catch (e) {
+        serial.printerr(e)
+        // EOF or read error - restore position and return null
+        // Note: seqread doesn't have seek, so we can't restore position
+        // This is okay since we're at EOF anyway
+    }
+
+    return null
+}
+
+// Playback loop - properly adapted from TEV with multi-file support
 try {
     let t1 = sys.nanoTime()
-    while (!stopPlay && seqread.getReadCount() < FILE_LENGTH && (header.totalFrames == 0 || header.totalFrames > 0 && frameCount < header.totalFrames)) {
+    let totalFilesProcessed = 0
+
+    while (!stopPlay && seqread.getReadCount() < FILE_LENGTH) {
+        // Check if we've finished the current file
+        if (header.totalFrames > 0 && frameCount >= header.totalFrames) {
+            console.log(`Completed file ${currentFileIndex}: ${frameCount} frames`)
+
+            // Try to read next TAV file header
+            let nextHeader = tryReadNextTAVHeader()
+            if (nextHeader) {
+                // Found another TAV file - update header and reset counters
+                header = nextHeader
+                frameCount = 0
+                currentFileIndex++
+                totalFilesProcessed++
+
+                console.log(`\nStarting file ${currentFileIndex}:`)
+                console.log(`Resolution: ${header.width}x${header.height}`)
+                console.log(`FPS: ${header.fps}`)
+                console.log(`Total frames: ${header.totalFrames}`)
+                console.log(`Wavelet filter: ${header.waveletFilter === WAVELET_5_3_REVERSIBLE ? "5/3 reversible" : "9/7 irreversible"}`)
+                console.log(`Quality: Y=${header.qualityY}, Co=${header.qualityCo}, Cg=${header.qualityCg}`)
+
+                // Reset motion vectors for new file
+                for (let i = 0; i < numTiles; i++) {
+                    motionVectors[i] = { mvX: 0, mvY: 0, rcf: 1.0 }
+                }
+
+                // Continue with new file
+                continue
+            } else {
+                // No more TAV files found
+                console.log(`\nNo more TAV files found. Total files processed: ${currentFileIndex}`)
+                break
+            }
+        }
+
+        // Original playback loop condition (but without totalFrames check since we handle it above)
+        if (seqread.getReadCount() >= FILE_LENGTH) {
+            break
+        }
 
         // Handle interactive controls
         if (interactive) {
@@ -713,7 +817,11 @@ try {
             if (!hasSubtitles) {
                 con.move(31, 1)
                 con.color_pair(253, 0)
-                print(`Frame: ${frameCount}/${header.totalFrames} (${((frameCount / akku2 * 100)|0) / 100}f)         `)
+                if (currentFileIndex > 1) {
+                    print(`File ${currentFileIndex}: ${frameCount}/${header.totalFrames} (${((frameCount / akku2 * 100)|0) / 100}f)         `)
+                } else {
+                    print(`Frame: ${frameCount}/${header.totalFrames} (${((frameCount / akku2 * 100)|0) / 100}f)         `)
+                }
                 con.move(32, 1)
                 con.color_pair(253, 0)
                 print(`VRate: ${(getVideoRate() / 1024 * 8)|0} kbps                               `)
@@ -738,7 +846,11 @@ finally {
     con.clear()
 
     if (errorlevel === 0) {
-        console.log(`Playback completed: ${frameCount} frames`)
+        if (currentFileIndex > 1) {
+            console.log(`Playback completed: ${currentFileIndex} files processed`)
+        } else {
+            console.log(`Playback completed: ${frameCount} frames`)
+        }
     } else {
         console.log(`Playback failed with error ${errorlevel}`)
     }
diff --git a/terranmon.txt b/terranmon.txt
index 47d1080..9fa80d7 100644
--- a/terranmon.txt
+++ b/terranmon.txt
@@ -971,12 +971,17 @@ A universal, simle cue designed to work as both playlist to cue up external file
     uint8  Magic[8]: "\x1F TSVM UCF"
     uint8  Version: 1
     uint16 Number of cue elements
-    unit8  Reserved[5]
+    uint32 (Optional) Size of the cue file, useful for allocating fixed length for future expansion; 0 when not used
+    unit8  Reserved
 
 ## Cue Element
-    uint8  Addressing Mode
+    uint8  Addressing Mode (low nybble) and Role Flags (high nybble)
             - 0x01: External
             - 0x02: Internal
+            - 0x10: Intended for machine interaction (GOP indices, frame indices, etc.)
+            - 0x20: Intended for human interaction (playlist, chapter markers, etc.)
+            - 0x30: Intended for both machine and human interaction
+            Role flags must be unset to assign no roles
     uint16 String Length for name
     *       Name of the element in UTF-8
 
diff --git a/video_encoder/encoder_tav.c b/video_encoder/encoder_tav.c
index 93a3a39..74b9b13 100644
--- a/video_encoder/encoder_tav.c
+++ b/video_encoder/encoder_tav.c
@@ -2940,10 +2940,6 @@ int main(int argc, char *argv[]) {
     // Update actual frame count in encoder struct  
     enc->total_frames = frame_count;
 
-    // Write final sync packet
-    uint8_t sync_packet = TAV_PACKET_SYNC;
-    fwrite(&sync_packet, 1, 1, enc->output_fp);
-
     // Update header with actual frame count (seek back to header position)
     if (enc->output_fp != stdout) {
         long current_pos = ftell(enc->output_fp);
diff --git a/video_encoder/encoder_tev.c b/video_encoder/encoder_tev.c
index dfff49f..2b88eef 100644
--- a/video_encoder/encoder_tev.c
+++ b/video_encoder/encoder_tev.c
@@ -2994,11 +2994,6 @@ int main(int argc, char *argv[]) {
     
     // Update actual frame count in encoder struct  
     enc->total_frames = frame_count;
-    
-    // Write final sync packet
-    uint8_t sync_packet = TEV_PACKET_SYNC;
-    fwrite(&sync_packet, 1, 1, output);
-    sync_packet_count++;
 
     // Update header with actual frame count (seek back to header position)
     if (!enc->output_to_stdout) {